[pstricks] \psMatrixPlot

[Herbert Voss]

Am 17.12.2009 22:03, schrieb mathias legrand:

> I'm using the \psMatrixPlot command with great pleasure but I would like
> to create my own
> colorType (from white to black). Is it possible and where do I have to
> look at ?
> (I've been investigating in the tex installation tree without success...)

the macro is defines in pstricks-add

\ifcase\psk at colorType
   dup 0 gt { 	% test if > 0
\or
  Min sub dMaxMin div 300 mul 400 add
  tx at addDict begin wavelengthToRGB Red Green Blue end setrgbcolor
\or
  Min sub dMaxMin div neg 1 add 300 mul 400 add
  tx at addDict begin wavelengthToRGB Red Green Blue end setrgbcolor
....

change _two lines_ to
\or
  Min sub dMaxMin div 300 mul 400 add
  tx at addDict begin wavelengthToRGB Red Green Blue RGBtoGRAY end setgray \or
  Min sub dMaxMin div neg 1 add 300 mul 400 add
  tx at addDict begin wavelengthToRGB Red Green Blue RGBtoGRAY end setgray


Herbert