Re: strange colormap behaviour with postscript printing

[Petr M. <mi...@ph...>]

> So IMHO this really can be considered a gnuplot bug.

It was designed this way when I have implemented pm3d; there were only gray 
and rgbformulae palettes. The interpolated palette colours were added later. 
So let us tell postscript to respect interpolated colour palette 
preferentially to the colour/gray setting. Then the fix is a one-liner.

In postscript file, change
	Color true and
to
	Color InterpolatedColor or

The patch for gnuplot source code is on sourceforge.

> Another possibility that occurs to me is to convert the custom color map 
> to a monochrome version and have gnuplot respect that?

With the above patch, any custom palette will keep the defined colours and 
gnuplot will respect it.


I think that Octave could pass the custom colormap() through a "rgb2gray()"
function before printing to any monochromatic device (not just monochromatic 
postscript). Then the plots
	print('mono.ps', '-dps')
	print('color.ps', '-dpsc')
will be same as in Matlab.

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PM