From: John H. <jdh...@ac...> - 2004-08-02 15:53:41
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>>>>> "Peter" == Peter Groszkowski <pgr...@ge...> writes: Peter> Hi: How many colors do images created via: Peter> imshow(Zi, cmap=cm.jet) Peter> (Zi = some data matrix) have? Peter> Are these true color? 256? Is there a simple way to define Peter> these things? The following image parameters can be configured from your rc file ### images image.aspect : free # free | preserve image.interpolation : bilinear # see help(imshow) for options image.cmap : jet # gray | jet image.lut : 256 # the size of the colormap lookup table image.origin : upper # lower | upper The image.lut parameter controls the size of the lookup table. You can change the default in the rc file, or dynamically in a single python session using the rc function. Eg, # default cmap is now 100 level grayscale by cm.jet and cm.gray unaffected >>> rc('image', lut=100, cmap='gray') >>> imshow(X) # show X with default cmap But you can also create your own color maps at any time using the cm.get_cmap function >>> jet512 = cm.get_cmap('jet', 512) >> imshow(X, cmap=jet512) Should work. JDH |