In the with clause of the plot command, the modifier colour, (abbrev. ‘c’), allows the colour of each dataset to be manually selected. It should be followed either by an integer, to set a colour from the present palette, or by a colour name. A list of valid colour names is given in Section 4.6. For example:
plot sin(x) with c 5 plot sin(x) with colour blue
The colour modifier can also be used when defining linestyles.
PyXPlot has a palette of colours which it assigns sequentially to datasets when colours are not manually assigned. This is also the palette to which integers passed to set colour refer – the ‘5’ above, for example. It may be set using the set palette command, which differs in syntax from gnuplot. It should be followed by a comma-separated list of colours, for example:
set palette red,green,blue
Another way of setting the palette, in a configuration file, is described in Section 4.2; a list of valid colour names is given in Section 4.6.