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Plot Colors

Several color schemes are used in Plot.

Before any drawing is made, the backcolor is applied to the plot box. The axes, frame, ticmarks, labels and titles are then drawn in the forecolor.

Text specified with the text/textc/textr commands is drawn with the textcolor.

Data is colored in two ways, depending on plot type:

  • where each data item is plotted in a single color (e.g. line plots), the items are drawn with the itemcolor

  • where a data item is banded and requires several colors to plot, (e.g. density plots), it is drawn with the bandcolor.

    The edges of filled-in shapes are drawn with the edgecolor (usually black).

    Backcolor, forecolor, textcolor and edgecolor are single colors.

    Itemcolor and bandcolor are lists of colors. Itemcolor typically contains quite distinctive colors to distinguish the different data items. Bandcolor is typically a graduated scale of colors, for example to indicate height. Typical lists of colors are defined in system\classes\plot\plotdefs.ijs.

    The term color can also be used as an abbreviation to specify the itemcolor or the bandcolor depending on plot type. This convenient for simple plots where only one plot type is being drawn.

    For example: 

    pd 'textcolor red'

    single color for text 

    pd 'itemcolor blue,red,green'

    list of colors for items 

    pd 'bandcolor bgclr'

    list of colors in color band 

    pd 'color blue,red'

    item or band colors (depends on plot type)

    The script system\classes\plot\plotdefs.ijs defines several color schemes, for example:

  • STDCLR is the color scheme used by default
  • RBCLR is a red/blue color scheme that is appropriate for 3D surface plots
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