i'm trying to use the results of permutation (from RandomArray.py) to reorder the rows of an array:
r=arange(20) id=permutation(20) y=r[id] Traceback (most recent call last): File "<stdin>", line 1, in ? IndexError: invalid index
i can use a for loop to permutate the ordering of r, but that has a speed hit associated with it. can anyone offer a suggestion for a way to do this more efficiently? thanks, serge -- Sergio J. Rey http://typhoon.sdsu.edu/rey.html
Serge Rey wrote:
i'm trying to use the results of permutation (from RandomArray.py) to reorder the rows of an array:
r=arange(20) id=permutation(20) y=r[id]
Try: y = take(r, permutation(len(r))) Scott -- Scott M. Ransom Address: Harvard-Smithsonian CfA Phone: (617) 496-7908 60 Garden St. MS 10 email: ransom@cfa.harvard.edu Cambridge, MA 02138 GPG Fingerprint: 06A9 9553 78BE 16DB 407B FFCA 9BFA B6FF FFD3 2989
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Serge Rey