draw_bar(ncfile, values)
  ncfile = ':' list of [filen];[dimslice];[xvarn];[yvarn]
    [filen]: name of the file
    [dimslice]: '|' list of [dimn],[dimrange]
      [dimn]: name of the dimension
      [dimrange]: range for the slice
        * [integer]: which value of the dimension
        * -1: all along the dimension
        * -9: last value of the dimension
        * [beg]@[end]@[inc] slice from [beg] to [end] every [inc]
        * NOTE, no dim name all the dimension size
    [xvarn]: name of the variable to use for the x-positions
    [yvarn]: name of the variable to use for the values
  values = [dimxyfmt]:[xaxislab]:[yaxislab]:[xunits]:[yunits]:[aval]:[labels]:[colors]:[wdth]:[graphtit]:
      [legvalues]:[kindfig]:[fign]:[close]
    [dimxyfmt]=[dxs],[dxf],[Ndx],[ordx],[dys],[dyf],[Ndy],[ordy]: format of the values at each
      axis (or single 'auto' for 'auto','auto')
      [dxs]: style of x-axis ('auto' for 'pretty')
        'Nfix', values computed at even 'Ndx'
        'Stringlist', a given list of strings
        'Vfix', values computed at even 'Ndx' increments
        'pretty', values computed following aprox. 'Ndx' at 'pretty' intervals (2.,2.5,4,5,10)
      [dxf]: format of the labels at the x-axis
      [Ndx]: Number of ticks at the x-axis (for 'Stringlist', '@' list of labels)
      [ordx]: angle of orientation of ticks at the x-axis ('auto' for horizontal)
      [dys]: style of y-axis ('auto' for 'pretty')
      [dyf]: format of the labels at the y-axis
      [Ndy]: Number of ticks at the y-axis
      [ordy]: angle of orientation of ticks at the y-axis ('auto' for horizontal)
    [xaxislab]: Label for the x-axis ('!' for spaces)
    [yaxislab]: Label for the y-axis ('!' for spaces)
    [xunits]: units of the x-label ('None' for no units)
    [yunits]: units of the y-label
    [aval]: which acis should be used for the values ('x' or 'y')
    [labels]: ',' list of labels for the legend ('None' for no-labels)
    [colors]: ',' list of colors (single value same color, 'auto' automatic)
    [wdth]: width of the bars
    [graphtit]: title of the figure '!' for spaces
    [legvalues]=[locleg]|[fontsize]:
      [locleg]: location of the legend (0, autmoatic)
        1: 'upper right', 2: 'upper left', 3: 'lower left', 4: 'lower right',
        5: 'right', 6: 'center left', 7: 'center right', 8: 'lower center',
        9: 'upper center', 10: 'center'
      [fontsize]: font size for the legend (auto for 12)
    [kindfig]: kind of output figure (png, pdf, ps)
    [fign]: name of the figure (without extension)
    [close]: whether figure should be close or not