[SciPy-user] Re: xplt documentation

John Hunter jdhunter at ace.bsd.uchicago.edu
Tue May 4 08:31:55 CDT 2004


>>>>> "Arnd" == Arnd Baecker <arnd.baecker at web.de> writes:

    Arnd> There is a patch on sourceforge for gnuplot which allows for
    Arnd> bitmap images (ie. matrices). I once tried it out and it is
    Arnd> very nice.  It might take a little time until this gets
    Arnd> integrated as the gnuplot team seems to be a bit busy with
    Arnd> after release issues.

    Arnd> If you really want to go for large matrices have a look at
    Arnd> MayaVi, http://mayavi.sourceforge.net/ In particular
    Arnd> http://mayavi.sourceforge.net/docs/guide/x967.html#TOOLS

Also the fairly new imshow in matplotlib plots grayscale and
pseudocolor numeric/numarray arrays.  This replaces the painfully slow
pcolor which was unusable except for small arrays.  The guts of imshow
are implemented entirely in numeric and extension code and should
handle large arrays efficiently.  If you encounter performance issues,
I'd like to know about it!

Right now the only false colormap is ColormapJet (see
examples/pcolor_demo2.py) but you can define your own by subclassing
matplotlib.colors.Colormap.

JDH



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