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Postscript
In order to reduce the size of postscript files, the gray value and not all
three calculated r,g,b values are written to the file. Therefore the
analytical formulae are coded directly in the postscript language as a header
just before the pm3d drawing, see /g and /cF definitions. Usually, it makes
sense to write therein definitions of only the 3 formulae used. But for
multiplot or any other reason you may want to manually edit the
transformations directly in the postscript file. This is the default option
nops_allcF. Using the option ps_allcF writes postscript definitions of
all formulae. This you may find interesting if you want to edit the
postscript file in order to have different palettes for different surfaces
in one graph. Well, you can achieve this functionality by multiplot with
fixed origin and size.
If pm3d map has been plotted from gridded or almost regular data with an
output to a postscript file, then it is possible to reduce the size of this
postscript file up to at about 50% by the enclosed awk script
pm3dCompress.awk. This you may find interesting if you intend to keep the
file for including it into your publication or before downloading a very large
file into a slow printer. Usage:
awk -f pm3dCompress.awk thefile.ps >smallerfile.ps
If pm3d map has been plotted from rectangular gridded data with an output
to a postscript file, then it is possible to reduce the file size even more
by the enclosed awk script pm3dConvertToImage.awk. Usage:
awk -f pm3dConvertToImage.awk <thefile.ps >smallerfile.ps
You may manually change the postscript output from gray to color and vice
versa and change the definition of 5#5maxcolors6#6.
Next: Colornames
Up: Palette
Previous: Gamma correction
Contents
Index
Ethan Merritt
2007-03-03