Re: Postscript and PM3D file size.

[Ethan A M. <merritt@u.washington.edu>]

On Tuesday 02 March 2004 08:20 pm, Justace Clutter wrote:
>
> 	I have this project where I have computed a bunch of channel
> correlations.  The entire matrix is like 1800x1800 with one side of the
> diaganal set to NaN since it is symetric.  Now to the root of the
> problem.  I use the pm3d portion of gnuplot to create a 2D map of the
> matrix.  Here is the snipplit of code that I use...
>       set terminal postscript eps color palfuncparam 500

This is a case where PostScript is probably the wrong format to choose
for output.   The PostScript output file will contain a separate command
for every point (or box or line or...) plotted, even if they all fall on top
of each other.  For very large datasets, where there are more data
points than the resolution of your output device, you are better off
using a pixel-based output format like PNG.   That way the output
size is fixed in advance.  No matter how many data points map to
a single pixel, it's still only one pixel.


-- 
Ethan A Merritt
Department of Biochemistry & Biomolecular Structure Center
University of Washington, Seattle