SF.net SVN: matplotlib: [5043] trunk/matplotlib

[<ef...@us...>]

Revision: 5043
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5043&view=rev
Author:   efiring
Date:     2008-04-15 10:41:53 -0700 (Tue, 15 Apr 2008)

Log Message:
-----------
Speed up color mapping

Modified Paths:
--------------
    trunk/matplotlib/CHANGELOG
    trunk/matplotlib/lib/matplotlib/colors.py

Modified: trunk/matplotlib/CHANGELOG
===================================================================
--- trunk/matplotlib/CHANGELOG	2008-04-13 04:52:41 UTC (rev 5042)
+++ trunk/matplotlib/CHANGELOG	2008-04-15 17:41:53 UTC (rev 5043)
@@ -1,3 +1,5 @@
+2008-04-15 Speed up color mapping. - EF
+
 2008-04-12 Speed up zooming and panning of dense images. - EF
 
 2008-04-11 Fix global font rcParam setting after initialization

Modified: trunk/matplotlib/lib/matplotlib/colors.py
===================================================================
--- trunk/matplotlib/lib/matplotlib/colors.py	2008-04-13 04:52:41 UTC (rev 5042)
+++ trunk/matplotlib/lib/matplotlib/colors.py	2008-04-15 17:41:53 UTC (rev 5043)
@@ -446,7 +446,7 @@
             lut = (self._lut * 255).astype(npy.uint8)
         else:
             lut = self._lut
-        rgba = lut[xa]
+        rgba = lut.take(xa, axis=0)  #  twice as fast as lut[xa]
         if vtype == 'scalar':
             rgba = tuple(rgba[0,:])
         return rgba


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