Hi, I think you should look into scipy.ndimage which has minimum_filter and maximum_filter
Matthieu 2007/7/24, Ludwig M Brinckmann <[EMAIL PROTECTED]>: > > Hi there, > > I have a large array, lets say 40000 * 512, which I need to downsample by > a factor of 4 in the y direction, by factor 3 in the x direction, so that my > resulting arrays are 10000 * 170 (or 171 this does not matter very much) - > but of all the values I will need to retain in the downsampled arrays the > minimum and maximum of the original data, rather than computing an average > or just picking every third/fourth value in the array. > So essentially I have a 4*3 window, for which I need the min and max in > this window, and store the result of applying this window to the original > array as my results. > > What is the best way to do this? > > Regards > Ludwig > _______________________________________________ > Numpy-discussion mailing list > [email protected] > http://projects.scipy.org/mailman/listinfo/numpy-discussion > >
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