| 1 | ############################################### |
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| 2 | ## PLANETOPLOT ## |
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| 3 | ## --> PPPLOT ## |
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| 4 | ############################################### |
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| 5 | ## Author: Aymeric Spiga. 02-03/2013 ## |
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| 6 | ############################################### |
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| 7 | # python built-in librairies |
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| 8 | import time as timelib |
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| 9 | # added librairies |
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| 10 | import numpy as np |
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| 11 | import matplotlib.pyplot as mpl |
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| 12 | from matplotlib.cm import get_cmap |
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| 13 | from mpl_toolkits.basemap import Basemap |
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| 14 | # personal librairies |
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| 15 | import ppcompute |
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| 16 | ############################################### |
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| 17 | |
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| 18 | ################################# |
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| 19 | # global variables and settings # |
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| 20 | ################################# |
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| 21 | |
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| 22 | # matplotlib settings |
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| 23 | # http://matplotlib.org/users/customizing.html |
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| 24 | # ------------------------------- |
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| 25 | mpl.rcParams['font.family'] = "serif" |
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| 26 | mpl.rcParams['axes.color_cycle'] = "r,g,b,k" |
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| 27 | mpl.rcParams['contour.negative_linestyle'] = "dashed" |
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| 28 | mpl.rcParams['verbose.level'] = "silent" |
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| 29 | mpl.rcParams['lines.linewidth'] = 1.5 |
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| 30 | mpl.rcParams['lines.markersize'] = 10 |
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| 31 | mpl.rcParams['xtick.major.pad'] = 10 |
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| 32 | mpl.rcParams['ytick.major.pad'] = 10 |
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| 33 | |
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| 34 | # global variables |
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| 35 | # ------------------------------- |
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| 36 | # - where settings files are located |
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| 37 | # (None means planetoplot_v2 in PYTHONPATH) |
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| 38 | whereset = None |
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| 39 | # - some good default settings. |
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| 40 | # (bounds) |
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| 41 | how_many_sigma = 3.0 |
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| 42 | # (contours) |
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| 43 | ccol = 'black' |
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| 44 | cline = 0.55 |
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| 45 | # (vectors) |
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| 46 | widthvec = 0.002 |
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| 47 | reducevec = 30. |
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| 48 | # (colorbar) |
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| 49 | zeorientation="vertical" |
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| 50 | zefrac = 0.05 |
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| 51 | # (save figures) |
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| 52 | pad_inches_value=0.25 |
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| 53 | ############################################### |
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| 54 | |
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| 55 | ########################## |
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| 56 | # executed when imported # |
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| 57 | ########################## |
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| 58 | ########################################### |
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| 59 | # we load user-defined automatic settings # |
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| 60 | ########################################### |
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| 61 | # initialize the warning variable about file not present... |
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| 62 | files_not_present = "" |
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| 63 | # ... and the whereset variable |
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| 64 | whereset = ppcompute.findset(whereset) |
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| 65 | |
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| 66 | # - variable settings |
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| 67 | # ------------------------------- |
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| 68 | zefile = "set_var.txt" |
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| 69 | vf = {} ; vc = {} ; vl = {} |
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| 70 | try: |
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| 71 | f = open(whereset+zefile, 'r') |
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| 72 | for line in f: |
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| 73 | if "#" in line: pass |
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| 74 | else: |
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| 75 | var, format, colorb, label = line.strip().split(';') |
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| 76 | ind = var.strip() |
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| 77 | vf[ind] = format.strip() |
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| 78 | vc[ind] = colorb.strip() |
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| 79 | vl[ind] = label.strip() |
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| 80 | f.close() |
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| 81 | except IOError: |
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| 82 | files_not_present = files_not_present + zefile + " " |
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| 83 | |
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| 84 | ## - file settings |
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| 85 | ## ------------------------------- |
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| 86 | #zefile = "set_file.txt" |
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| 87 | #prefix_t = {} ; suffix_t = {} ; name_t = {} ; proj_t = {} ; vecx_t = {} ; vecy_t = {} |
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| 88 | #try: |
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| 89 | # f = open(whereset+zefile, 'r') |
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| 90 | # for line in f: |
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| 91 | # if "#" in line: pass |
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| 92 | # else: |
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| 93 | # prefix, suffix, name, proj, vecx, vecy = line.strip().split(';') |
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| 94 | # ind = name.strip() |
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| 95 | # prefix_t[ind] = prefix.strip() |
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| 96 | # suffix_t[ind] = suffix.strip() |
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| 97 | # #name_t[ind] = name.strip() |
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| 98 | # proj_t[ind] = proj.strip() |
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| 99 | # vecx_t[ind] = vecx.strip() |
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| 100 | # vecy_t[ind] = vecy.strip() |
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| 101 | # f.close() |
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| 102 | #except IOError: |
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| 103 | # files_not_present = files_not_present + zefile + " " |
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| 104 | |
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| 105 | # - multiplot settings |
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| 106 | # ------------------------------- |
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| 107 | zefile = "set_multiplot.txt" |
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| 108 | subv_t = {} ; subh_t = {} ; wspace_t = {} ; hspace_t = {} ; font_t = {} |
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| 109 | try: |
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| 110 | f = open(whereset+zefile, 'r') |
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| 111 | for line in f: |
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| 112 | if "#" in line: pass |
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| 113 | else: |
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| 114 | num, subv, subh, wspace, hspace, font = line.strip().split(';') |
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| 115 | ind = int(num.strip()) |
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| 116 | subv_t[ind] = int(subv.strip()) |
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| 117 | subh_t[ind] = int(subh.strip()) |
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| 118 | wspace_t[ind] = float(wspace.strip()) |
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| 119 | hspace_t[ind] = float(hspace.strip()) |
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| 120 | font_t[ind] = float(font.strip()) |
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| 121 | f.close() |
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| 122 | except IOError: |
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| 123 | files_not_present = files_not_present + zefile + " " |
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| 124 | |
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| 125 | # - background settings |
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| 126 | # ------------------------------- |
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| 127 | zefile = "set_back.txt" |
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| 128 | back = {} |
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| 129 | try: |
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| 130 | f = open(whereset+zefile, 'r') |
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| 131 | for line in f: |
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| 132 | if "#" in line: pass |
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| 133 | else: |
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| 134 | name, link = line.strip().split(';') |
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| 135 | ind = name.strip() |
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| 136 | back[ind] = link.strip() |
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| 137 | f.close() |
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| 138 | except IOError: |
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| 139 | files_not_present = files_not_present + zefile + " " |
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| 140 | |
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| 141 | # - area settings |
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| 142 | # ------------------------------- |
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| 143 | zefile = "set_area.txt" |
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| 144 | area = {} |
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| 145 | try: |
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| 146 | f = open(whereset+zefile, 'r') |
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| 147 | for line in f: |
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| 148 | if "#" in line: pass |
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| 149 | else: |
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| 150 | name, wlat1, wlat2, wlon1, wlon2 = line.strip().split(';') |
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| 151 | area[name.strip()] = [[float(wlon1.strip()),float(wlon2.strip())],\ |
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| 152 | [float(wlat1.strip()),float(wlat2.strip())]] |
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| 153 | f.close() |
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| 154 | except IOError: |
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| 155 | files_not_present = files_not_present + zefile + " " |
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| 156 | # A note to the user about missing files |
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| 157 | if files_not_present != "": |
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| 158 | print "warning: files "+files_not_present+" not in "+whereset+" ; those presets will be missing" |
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| 159 | |
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| 160 | # TBD: should change vector color with colormaps |
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| 161 | #"gist_heat": "white",\ |
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| 162 | #"hot": "white",\ |
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| 163 | #"gray": "red",\ |
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| 164 | |
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| 165 | #################### |
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| 166 | # useful functions # |
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| 167 | #################### |
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| 168 | |
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| 169 | # a function to define subplot |
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| 170 | # ... user can change settings in set_multiplot.txt read above |
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| 171 | # ------------------------------- |
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| 172 | def definesubplot(numplot, fig): |
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| 173 | try: |
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| 174 | mpl.rcParams['font.size'] = font_t[numplot] |
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| 175 | except: |
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| 176 | mpl.rcParams['font.size'] = 18 |
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| 177 | try: |
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| 178 | fig.subplots_adjust(wspace = wspace_t[numplot], hspace = hspace_t[numplot]) |
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| 179 | subv, subh = subv_t[numplot],subh_t[numplot] |
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| 180 | except: |
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| 181 | print "!! WARNING !! no preset found from set_multiplot.txt, or this setting file was not found." |
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| 182 | subv = 1 ; subh = numplot |
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| 183 | return subv,subh |
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| 184 | |
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| 185 | # a function to calculate automatically bounds (or simply prescribe those) |
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| 186 | # ------------------------------- |
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| 187 | def calculate_bounds(field,vmin=None,vmax=None): |
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| 188 | # prescribed cases first |
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| 189 | zevmin = vmin |
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| 190 | zevmax = vmax |
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| 191 | # computed cases |
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| 192 | if zevmin is None or zevmax is None: |
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| 193 | # select values |
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| 194 | ind = np.where(field < 9e+35) |
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| 195 | fieldcalc = field[ ind ] # field must be a numpy array |
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| 196 | # calculate stdev and mean |
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| 197 | dev = np.std(fieldcalc)*how_many_sigma |
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| 198 | damean = ppcompute.mean(fieldcalc) |
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| 199 | # fill min/max if needed |
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| 200 | if vmin is None: zevmin = damean - dev |
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| 201 | if vmax is None: zevmax = damean + dev |
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| 202 | # special case: negative values with stddev while field is positive |
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| 203 | if zevmin < 0. and ppcompute.min(fieldcalc) > 0.: zevmin = 0. |
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| 204 | return zevmin, zevmax |
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| 205 | #### treat vmin = vmax for continuity |
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| 206 | #if vmin == vmax: zevmin = damean - dev ; zevmax = damean + dev |
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| 207 | |
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| 208 | # a function to solve the problem with blank bounds ! |
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| 209 | # ------------------------------- |
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| 210 | def bounds(what_I_plot,zevmin,zevmax,miss=9e+35): |
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| 211 | small_enough = 1.e-7 |
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| 212 | if zevmin < 0: what_I_plot[ what_I_plot < zevmin*(1.-small_enough) ] = zevmin*(1.-small_enough) |
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| 213 | else: what_I_plot[ what_I_plot < zevmin*(1.+small_enough) ] = zevmin*(1.+small_enough) |
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| 214 | what_I_plot[ what_I_plot > miss ] = -miss |
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| 215 | what_I_plot[ what_I_plot > zevmax ] = zevmax*(1.-small_enough) |
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| 216 | return what_I_plot |
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| 217 | |
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| 218 | # a generic function to show (GUI) or save a plot (PNG,EPS,PDF,...) |
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| 219 | # ------------------------------- |
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| 220 | def save(mode="gui",filename="plot",folder="./",includedate=True,res=150,custom=False): |
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| 221 | # a few settings |
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| 222 | possiblesave = ['eps','ps','svg','png','jpg','pdf'] |
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| 223 | # now the main instructions |
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| 224 | if mode == "gui": |
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| 225 | mpl.show() |
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| 226 | elif mode in possiblesave: |
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| 227 | ## name of plot |
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| 228 | name = folder+'/'+filename |
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| 229 | if includedate: |
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| 230 | for ttt in timelib.gmtime(): |
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| 231 | name = name + "_" + str(ttt) |
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| 232 | name = name +"."+mode |
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| 233 | ## save file |
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| 234 | print "**** Saving file in "+mode+" format... Please wait." |
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| 235 | if not custom: |
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| 236 | # ... regular plots |
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| 237 | mpl.savefig(name,dpi=res,pad_inches=pad_inches_value,bbox_inches='tight') |
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| 238 | else: |
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| 239 | # ... mapping mode, adapted space for labels etc... |
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| 240 | mpl.savefig(name,dpi=res) |
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| 241 | else: |
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| 242 | print "!! ERROR !! File format not supported. Supported: ",possiblesave |
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| 243 | |
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| 244 | ################################## |
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| 245 | # a generic class to make a plot # |
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| 246 | ################################## |
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| 247 | class plot(): |
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| 248 | |
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| 249 | # print out a help string when help is invoked on the object |
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| 250 | # ------------------------------- |
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| 251 | def __repr__(self): |
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| 252 | whatprint = 'plot object. \"help(plot)\" for more information\n' |
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| 253 | return whatprint |
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| 254 | |
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| 255 | # default settings |
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| 256 | # -- user can define settings by two methods. |
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| 257 | # -- 1. yeah = plot2d(title="foo") |
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| 258 | # -- 2. yeah = pp() ; yeah.title = "foo" |
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| 259 | # ------------------------------- |
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| 260 | def __init__(self,\ |
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| 261 | var=None,\ |
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| 262 | field=None,\ |
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| 263 | absc=None,\ |
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| 264 | xlabel="",\ |
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| 265 | ylabel="",\ |
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| 266 | div=20,\ |
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| 267 | logx=False,\ |
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| 268 | logy=False,\ |
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| 269 | swap=False,\ |
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| 270 | swaplab=True,\ |
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| 271 | invert=False,\ |
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| 272 | xcoeff=1.,\ |
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| 273 | ycoeff=1.,\ |
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| 274 | title=""): |
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| 275 | ## what could be defined by the user |
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| 276 | self.var = var |
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| 277 | self.field = field |
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| 278 | self.absc = absc |
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| 279 | self.xlabel = xlabel |
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| 280 | self.ylabel = ylabel |
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| 281 | self.title = title |
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| 282 | self.div = div |
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| 283 | self.logx = logx |
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| 284 | self.logy = logy |
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| 285 | self.swap = swap |
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| 286 | self.swaplab = swaplab # NB: swaplab only used if swap=True |
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| 287 | self.invert = invert |
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| 288 | self.xcoeff = xcoeff |
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| 289 | self.ycoeff = ycoeff |
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| 290 | ## other useful arguments |
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| 291 | ## ... not used here in ppplot but need to be attached to plot object |
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| 292 | self.axisbg = "white" |
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| 293 | self.superpose = False |
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| 294 | |
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| 295 | # check |
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| 296 | # ------------------------------- |
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| 297 | def check(self): |
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| 298 | if self.field is None: print "!! ERROR !! Please define a field to be plotted" ; exit() |
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| 299 | |
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| 300 | # define_from_var |
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| 301 | # ... this uses settings in set_var.txt |
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| 302 | # ------------------------------- |
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| 303 | def define_from_var(self): |
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| 304 | if self.var is not None: |
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| 305 | if self.var.upper() in vl.keys(): |
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| 306 | self.title = vl[self.var.upper()] |
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| 307 | |
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| 308 | # make |
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| 309 | # this is generic to all plots |
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| 310 | # ------------------------------- |
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| 311 | def make(self): |
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| 312 | self.check() |
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| 313 | mpl.xlabel(self.xlabel) |
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| 314 | mpl.ylabel(self.ylabel) |
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| 315 | if self.swap: |
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| 316 | if self.swaplab: |
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| 317 | mpl.xlabel(self.ylabel) |
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| 318 | mpl.ylabel(self.xlabel) |
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| 319 | mpl.title(self.title) |
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| 320 | # if masked array, set masked values to filled values (e.g. np.nan) for plotting purposes |
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| 321 | if type(self.field).__name__ in 'MaskedArray': |
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| 322 | self.field[self.field.mask] = self.field.fill_value |
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| 323 | |
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| 324 | ################################ |
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| 325 | # a subclass to make a 1D plot # |
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| 326 | ################################ |
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| 327 | class plot1d(plot): |
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| 328 | |
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| 329 | # print out a help string when help is invoked on the object |
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| 330 | # ------------------------------- |
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| 331 | def __repr__(self): |
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| 332 | whatprint = 'plot1d object. \"help(plot1d)\" for more information\n' |
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| 333 | return whatprint |
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| 334 | |
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| 335 | # default settings |
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| 336 | # -- user can define settings by two methods. |
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| 337 | # -- 1. yeah = plot1d(title="foo") |
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| 338 | # -- 2. yeah = pp() ; yeah.title = "foo" |
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| 339 | # ------------------------------- |
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| 340 | def __init__(self,\ |
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| 341 | lstyle='-',\ |
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| 342 | color='b',\ |
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| 343 | marker='x'): |
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| 344 | ## get initialization from parent class |
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| 345 | plot.__init__(self) |
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| 346 | ## what could be defined by the user |
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| 347 | self.lstyle = lstyle |
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| 348 | self.color = color |
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| 349 | self.marker = marker |
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| 350 | |
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| 351 | # define_from_var |
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| 352 | # ... this uses settings in set_var.txt |
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| 353 | # ------------------------------- |
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| 354 | def define_from_var(self): |
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| 355 | # get what is done in the parent class |
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| 356 | plot.define_from_var(self) |
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| 357 | # add specific stuff |
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| 358 | if self.var is not None: |
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| 359 | if self.var.upper() in vl.keys(): |
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| 360 | self.ylabel = vl[self.var.upper()] |
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| 361 | self.title = "" |
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| 362 | |
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| 363 | # make |
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| 364 | # ------------------------------- |
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| 365 | def make(self): |
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| 366 | # get what is done in the parent class |
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| 367 | plot.make(self) |
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| 368 | # add specific stuff |
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| 369 | mpl.grid(color='grey') |
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| 370 | if self.lstyle == "": self.lstyle = " " # to allow for no line at all with "" |
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| 371 | # swapping if requested |
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| 372 | if self.swap: x = self.field ; y = self.absc |
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| 373 | else: x = self.absc ; y = self.field |
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| 374 | # coefficients on axis |
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| 375 | x=x*self.xcoeff ; y=y*self.ycoeff |
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| 376 | # check axis |
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| 377 | if x.size != y.size: |
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| 378 | print "!! ERROR !! x and y sizes don't match on 1D plot.", x.size, y.size |
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| 379 | exit() |
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| 380 | # make the 1D plot |
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| 381 | # either request linestyle or let matplotlib decide |
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| 382 | if self.lstyle is not None and self.color is not None: |
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| 383 | mpl.plot(x,y,self.color+self.lstyle,marker=self.marker) |
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| 384 | else: |
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| 385 | mpl.plot(x,y,marker=self.marker) |
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| 386 | # make log axes and/or invert ordinate |
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| 387 | # ... this must be after plot so that axis bounds are well-defined |
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| 388 | # ... also inverting must be after making the thing logarithmic |
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| 389 | if self.logx: mpl.semilogx() |
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| 390 | if self.logy: mpl.semilogy() |
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| 391 | if self.invert: ax = mpl.gca() ; ax.set_ylim(ax.get_ylim()[::-1]) |
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| 392 | ## TBD: set with .div the number of ticks |
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| 393 | ## TBD: be able to control plot limits |
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| 394 | #ticks = self.div + 1 |
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| 395 | #ax = mpl.gca() |
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| 396 | #ax.get_xaxis().set_ticks(np.linspace(ppcompute.min(x),ppcompute.max(x),ticks/2+1)) |
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| 397 | |
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| 398 | ################################ |
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| 399 | # a subclass to make a 2D plot # |
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| 400 | ################################ |
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| 401 | class plot2d(plot): |
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| 402 | |
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| 403 | # print out a help string when help is invoked on the object |
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| 404 | # ------------------------------- |
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| 405 | def __repr__(self): |
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| 406 | whatprint = 'plot2d object. \"help(plot2d)\" for more information\n' |
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| 407 | return whatprint |
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| 408 | |
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| 409 | # default settings |
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| 410 | # -- user can define settings by two methods. |
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| 411 | # -- 1. yeah = plot2d(title="foo") |
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| 412 | # -- 2. yeah = pp() ; yeah.title = "foo" |
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| 413 | # ------------------------------- |
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| 414 | def __init__(self,\ |
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| 415 | ordi=None,\ |
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| 416 | mapmode=False,\ |
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| 417 | proj="cyl",\ |
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| 418 | back=None,\ |
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| 419 | colorb="jet",\ |
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| 420 | trans=1.0,\ |
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| 421 | addvecx=None,\ |
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| 422 | addvecy=None,\ |
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| 423 | addcontour=None,\ |
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| 424 | fmt="%.2e",\ |
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| 425 | blon=None,\ |
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| 426 | blat=None,\ |
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| 427 | area=None,\ |
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| 428 | vmin=None,\ |
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| 429 | vmax=None,\ |
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| 430 | colorvec="black"): |
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| 431 | ## get initialization from parent class |
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| 432 | plot.__init__(self) |
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| 433 | ## what could be defined by the user |
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| 434 | self.ordi = ordi |
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| 435 | self.mapmode = mapmode |
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| 436 | self.proj = proj |
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| 437 | self.back = back |
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| 438 | self.colorb = colorb |
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| 439 | self.trans = trans |
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| 440 | self.addvecx = addvecx |
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| 441 | self.addvecy = addvecy |
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| 442 | self.colorvec = colorvec |
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| 443 | self.addcontour = addcontour |
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| 444 | self.fmt = fmt |
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| 445 | self.blon = blon ; self.blat = blat |
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| 446 | self.area = area |
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| 447 | self.vmin = vmin ; self.vmax = vmax |
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| 448 | |
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| 449 | # define_from_var |
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| 450 | # ... this uses settings in set_var.txt |
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| 451 | # ------------------------------- |
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| 452 | def define_from_var(self): |
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| 453 | # get what is done in the parent class |
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| 454 | plot.define_from_var(self) |
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| 455 | # add specific stuff |
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| 456 | if self.var is not None: |
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| 457 | if self.var.upper() in vl.keys(): |
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| 458 | self.colorb = vc[self.var.upper()] |
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| 459 | self.fmt = vf[self.var.upper()] |
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| 460 | |
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| 461 | # make |
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| 462 | # ------------------------------- |
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| 463 | def make(self): |
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| 464 | # get what is done in the parent class... |
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| 465 | plot.make(self) |
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| 466 | # ... then add specific stuff |
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| 467 | ############################################################################################ |
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| 468 | ### PRE-SETTINGS |
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| 469 | ############################################################################################ |
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| 470 | # transposing if necessary |
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| 471 | shape = self.field.shape |
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| 472 | if shape[0] != shape[1]: |
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| 473 | if len(self.absc) == shape[0] and len(self.ordi) == shape[1]: |
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| 474 | print "!! WARNING !! Transposing axes" |
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| 475 | self.field = np.transpose(self.field) |
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| 476 | # bound field |
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| 477 | zevmin, zevmax = calculate_bounds(self.field,vmin=self.vmin,vmax=self.vmax) |
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| 478 | what_I_plot = bounds(self.field,zevmin,zevmax) |
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| 479 | # define contour field levels. define color palette |
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| 480 | ticks = self.div + 1 |
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| 481 | zelevels = np.linspace(zevmin,zevmax,ticks) |
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| 482 | palette = get_cmap(name=self.colorb) |
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| 483 | # do the same thing for possible contourline entries |
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| 484 | if self.addcontour is not None: |
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| 485 | # if masked array, set masked values to filled values (e.g. np.nan) for plotting purposes |
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| 486 | if type(self.addcontour).__name__ in 'MaskedArray': |
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| 487 | self.addcontour[self.addcontour.mask] = self.addcontour.fill_value |
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| 488 | zevminc, zevmaxc = calculate_bounds(self.addcontour) |
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| 489 | what_I_contour = bounds(self.addcontour,zevminc,zevmaxc) |
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| 490 | ticks = self.div + 1 |
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| 491 | zelevelsc = np.linspace(zevminc,zevmaxc,ticks) |
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| 492 | ############################################################################################ |
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| 493 | ### MAIN PLOT |
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| 494 | ### NB: contour lines are done before contour shades otherwise colorar error |
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| 495 | ############################################################################################ |
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| 496 | if not self.mapmode: |
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| 497 | ## A SIMPLE 2D PLOT |
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| 498 | ################### |
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| 499 | # swapping if requested |
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| 500 | if self.swap: x = self.ordi ; y = self.absc |
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| 501 | else: x = self.absc ; y = self.ordi |
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| 502 | # coefficients on axis |
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| 503 | x=x*self.xcoeff ; y=y*self.ycoeff |
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| 504 | # make shaded and line contours |
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| 505 | if self.addcontour is not None: |
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| 506 | mpl.contour(x, y, what_I_contour, \ |
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| 507 | zelevelsc, colors = ccol, linewidths = cline) |
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| 508 | mpl.contourf(x, y, \ |
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| 509 | self.field, \ |
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| 510 | zelevels, cmap=palette) |
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| 511 | # make log axes and/or invert ordinate |
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| 512 | if self.logx: mpl.semilogx() |
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| 513 | if self.logy: mpl.semilogy() |
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| 514 | if self.invert: ax = mpl.gca() ; ax.set_ylim(ax.get_ylim()[::-1]) |
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| 515 | else: |
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| 516 | ## A 2D MAP USING PROJECTIONS (basemap) |
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| 517 | ####################################### |
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| 518 | mpl.xlabel("") ; mpl.ylabel("") |
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| 519 | # additional security in case self.proj is None here |
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| 520 | # ... we set cylindrical projection (the simplest one) |
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| 521 | if self.proj is None: self.proj = "cyl" |
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| 522 | # get lon and lat in 2D version. |
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| 523 | # (but first ensure we do have 2D coordinates) |
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| 524 | if self.absc.ndim == 1: [self.absc,self.ordi] = np.meshgrid(self.absc,self.ordi) |
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| 525 | elif self.absc.ndim > 2: print "!! ERROR !! lon and lat arrays must be 1D or 2D" |
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| 526 | # get lat lon intervals and associated settings |
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| 527 | wlon = [np.min(self.absc),np.max(self.absc)] |
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| 528 | wlat = [np.min(self.ordi),np.max(self.ordi)] |
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| 529 | # -- area presets are in set_area.txt |
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| 530 | if self.area is not None: |
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| 531 | if self.area in area.keys(): |
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| 532 | wlon, wlat = area[self.area] |
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| 533 | # -- settings for meridians and parallels |
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| 534 | steplon = abs(wlon[1]-wlon[0])/6. |
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| 535 | steplat = abs(wlat[1]-wlat[0])/3. |
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| 536 | mertab = np.r_[wlon[0]:wlon[1]:steplon] ; merlab = [0,0,0,1] |
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| 537 | partab = np.r_[wlat[0]:wlat[1]:steplat] ; parlab = [1,0,0,0] |
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| 538 | format = '%.1f' |
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| 539 | # -- center of domain and bounding lats |
|---|
| 540 | lon_0 = 0.5*(wlon[0]+wlon[1]) |
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| 541 | lat_0 = 0.5*(wlat[0]+wlat[1]) |
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| 542 | # some tests, bug fixes, and good-looking settings |
|---|
| 543 | # ... cyl is good for global and regional |
|---|
| 544 | if self.proj == "cyl": |
|---|
| 545 | format = '%.0f' |
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| 546 | # ... global projections |
|---|
| 547 | elif self.proj in ["ortho","moll","robin"]: |
|---|
| 548 | wlat[0] = None ; wlat[1] = None ; wlon[0] = None ; wlon[1] = None |
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| 549 | steplon = 30. ; steplat = 30. |
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| 550 | if self.proj == "robin": steplon = 60. |
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| 551 | mertab = np.r_[-360.:360.:steplon] |
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| 552 | partab = np.r_[-90.:90.:steplat] |
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| 553 | if self.proj == "ortho": |
|---|
| 554 | merlab = [0,0,0,0] ; parlab = [0,0,0,0] |
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| 555 | # in ortho projection, blon and blat can be used to set map center |
|---|
| 556 | if self.blon is not None: lon_0 = self.blon |
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| 557 | if self.blat is not None: lat_0 = self.blat |
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| 558 | elif self.proj == "moll": |
|---|
| 559 | merlab = [0,0,0,0] |
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| 560 | format = '%.0f' |
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| 561 | # ... regional projections |
|---|
| 562 | elif self.proj in ["lcc","laea","merc"]: |
|---|
| 563 | if self.proj in ["lcc","laea"] and wlat[0] == -wlat[1]: |
|---|
| 564 | print "!! ERROR !! with Lambert lat1 must be different than lat2" ; exit() |
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| 565 | if wlat[0] < -80. and wlat[1] > 80.: |
|---|
| 566 | print "!! ERROR !! set an area (not global)" ; exit() |
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| 567 | format = '%.0f' |
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| 568 | elif self.proj in ["npstere","spstere"]: |
|---|
| 569 | # in polar projections, blat gives the bounding lat |
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| 570 | # if not set, set something reasonable |
|---|
| 571 | if self.blat is None: self.blat = 60. |
|---|
| 572 | # help the user who forgets self.blat would better be negative in spstere |
|---|
| 573 | # (this actually serves for the default setting just above) |
|---|
| 574 | if self.proj == "spstere" and self.blat > 0: self.blat = -self.blat |
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| 575 | # ... unsupported projections |
|---|
| 576 | else: |
|---|
| 577 | print "!! ERROR !! unsupported projection. supported: "+\ |
|---|
| 578 | "cyl, npstere, spstere, ortho, moll, robin, lcc, laea, merc" |
|---|
| 579 | # finally define projection |
|---|
| 580 | m = Basemap(projection=self.proj,\ |
|---|
| 581 | lat_0=lat_0,lon_0=lon_0,\ |
|---|
| 582 | boundinglat=self.blat,\ |
|---|
| 583 | llcrnrlat=wlat[0],urcrnrlat=wlat[1],\ |
|---|
| 584 | llcrnrlon=wlon[0],urcrnrlon=wlon[1]) |
|---|
| 585 | # draw meridians and parallels |
|---|
| 586 | ft = int(mpl.rcParams['font.size']*3./4.) |
|---|
| 587 | m.drawmeridians(mertab,labels=merlab,color='grey',linewidth=0.75,fontsize=ft,fmt=format) |
|---|
| 588 | m.drawparallels(partab,labels=parlab,color='grey',linewidth=0.75,fontsize=ft,fmt=format) |
|---|
| 589 | # define background (see set_back.txt) |
|---|
| 590 | if self.back is not None: |
|---|
| 591 | if self.back in back.keys(): |
|---|
| 592 | print "**** info: loading a background, please wait.",self.back |
|---|
| 593 | if back not in ["coast","sea"]: m.warpimage(back[self.back],scale=0.75) |
|---|
| 594 | elif back == "coast": m.drawcoastlines() |
|---|
| 595 | elif back == "sea": m.drawlsmask(land_color='white',ocean_color='aqua') |
|---|
| 596 | else: |
|---|
| 597 | print "!! ERROR !! requested background not defined. change name or fill in set_back.txt" ; exit() |
|---|
| 598 | # define x and y given the projection |
|---|
| 599 | x, y = m(self.absc, self.ordi) |
|---|
| 600 | # contour field. first line contour then shaded contour. |
|---|
| 601 | if self.addcontour is not None: |
|---|
| 602 | m.contour(x, y, what_I_contour, \ |
|---|
| 603 | zelevelsc, colors = ccol, linewidths = cline) |
|---|
| 604 | m.contourf(x, y, what_I_plot, zelevels, cmap = palette, alpha = self.trans) |
|---|
| 605 | ############################################################################################ |
|---|
| 606 | ### COLORBAR |
|---|
| 607 | ############################################################################################ |
|---|
| 608 | if self.trans > 0.: |
|---|
| 609 | ## draw colorbar. settings are different with projections. or if not mapmode. |
|---|
| 610 | if not self.mapmode: orientation=zeorientation ; frac = 0.075 ; pad = 0.03 |
|---|
| 611 | elif self.proj in ['moll']: orientation="horizontal" ; frac = 0.075 ; pad = 0.03 |
|---|
| 612 | elif self.proj in ['cyl']: orientation="vertical" ; frac = 0.023 ; pad = 0.03 |
|---|
| 613 | else: orientation = zeorientation ; frac = zefrac ; pad = 0.03 |
|---|
| 614 | zelevpal = np.linspace(zevmin,zevmax,num=min([ticks/2+1,21])) |
|---|
| 615 | zecb = mpl.colorbar(fraction=frac,pad=pad,\ |
|---|
| 616 | format=self.fmt,orientation=orientation,\ |
|---|
| 617 | ticks=zelevpal,\ |
|---|
| 618 | extend='neither',spacing='proportional') |
|---|
| 619 | if zeorientation == "horizontal": zecb.ax.set_xlabel(self.title) ; self.title = "" |
|---|
| 620 | ############################################################################################ |
|---|
| 621 | ### VECTORS. must be after the colorbar. we could also leave possibility for streamlines. |
|---|
| 622 | ############################################################################################ |
|---|
| 623 | ### not expecting NaN in self.addvecx and self.addvecy. masked arrays is just enough. |
|---|
| 624 | stride = 3 |
|---|
| 625 | if self.addvecx is not None and self.addvecy is not None and self.mapmode: |
|---|
| 626 | ## for metwinds only ??? |
|---|
| 627 | [vecx,vecy] = m.rotate_vector(self.addvecx,self.addvecy,self.absc,self.ordi) |
|---|
| 628 | # reference vector is scaled |
|---|
| 629 | zescale = ppcompute.mean(np.sqrt(self.addvecx*self.addvecx+self.addvecy*self.addvecy)) |
|---|
| 630 | # make vector field |
|---|
| 631 | q = m.quiver( x[::stride,::stride],y[::stride,::stride],\ |
|---|
| 632 | vecx[::stride,::stride],vecy[::stride,::stride],\ |
|---|
| 633 | angles='xy',color=self.colorvec,pivot='middle',\ |
|---|
| 634 | scale=zescale*reducevec,width=widthvec ) |
|---|
| 635 | # make vector key. default is on upper left corner. |
|---|
| 636 | p = mpl.quiverkey(q,-0.03,1.08,\ |
|---|
| 637 | zescale,str(int(zescale)),\ |
|---|
| 638 | color='black',labelpos='S',labelsep = 0.07) |
|---|
| 639 | #### streamplot!!! avec basemap |
|---|
