>> But even if indices = array, one still needs to do something like: >> for index in indices: histogram[index] += 1 >> >> Which is slow in python and fast in C. >> >> > I thought of a broadcasting approach... what are the chances that a > simple > > bins[:] = 0 > bins[ img.flat ] += 1
That doesn't work cumulatively, it seems. Some bins get a value of '1', but it never gets incremented past that. It was worth a try, though... in some cases in-place updating seems to work this way (which is usually a source of confusion on this list, not the desired result!) Zach _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
