draw_vertical_levels(ncfile, values, varn)
 nbsp;ncfile= file to use
 nbsp;values= [zlogs]:[plogs]:[title]:[graphic_kind]:[legvals]:[closefig]
   nbsp;[zlogs]= zlog,dzlog
     nbsp;zlog: to use logarithmic scale on the height axis ('true/false')
     nbsp;dzlog: to use logarithmic scale on the difference of height between levels axis ('true/false')
   nbsp;[plogs]= plog,dplog
     nbsp;plog: to use logarithmic scale on the height axis ('true/false')
     nbsp;dplog: to use logarithmic scale on the difference of height between levels axis ('true/false')
   nbsp;[title]= title of the graph ('!' for spaces)
   nbsp;[graphic_kind]= kind of figure (jpg, pdf, png)
   nbsp;[legvals]=[locleg]|[fontsize] legend values
     nbsp;[locleg]: location of the legend (0, autmoatic)
       nbsp;1: 'upper right', 2: 'upper left', 3: 'lower left', 4: 'lower right',
       nbsp;5: 'right', 6: 'center left', 7: 'center right', 8: 'lower center',
       nbsp;9: 'upper center', 10: 'center'
     nbsp;[fontsize]: font size for the legend (auto for 12)
   nbsp;[closefig]= whether figures should be closed or not
 nbsp;[varn]= [varnheight],[varnpres]
   nbsp;varnheight: name of the variable with the height of the vertical levels
     nbsp;'WRFz': for WRF z-levels (computed as (PH + PHB)/g, from a PHB(0,i,j) = 0)
   nbsp;varnpres: name of the variable with the pressure of the vertical levels ('None', for no pressure plot)
     nbsp;'WRFp': for WRF p-levels (computed as P + PB, from a PHB(0,i,j) = 0)