graph.py, the component of VPython that produces graphs, has been
updated to fix a problem with ghistogram, which wasn't handling x < 0
properly. Thanks to Giulio Venezian for pointing out this problem.
He also suggested an improvement to the demo program gas.py to make the
initial distribution isotropic.
Both of these fixes have been checked into CVS and are also available in
the zip files for "all platforms" at vpython.org. Not incorporated into
any of the installers yet, however.
Bruce Sherwood
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