would anyone object to fixing the numpy mean and stdv functions, so that they always used a 64-bit value to track sums, or so that they used a running calculation. That way
np.mean(np.zeros([4000,4000],'f4')+500) would not equal 511.493408? ` On May 31, 2011, at 6:08 PM, Charles R Harris wrote: > Hi All, > > I've been contemplating new functions that could be added to numpy and > thought I'd run them by folks to see if there is any interest. > > 1) Modified sort/argsort functions that return the maximum k values. > This is easy to do with heapsort and almost as easy with mergesort. > > 2) Ufunc fadd (nanadd?) Treats nan as zero in addition. Should make a faster > version of nansum possible. > > 3) Fast medians. > > > Chuck > _______________________________________________ > NumPy-Discussion mailing list > NumPy-Discussion@scipy.org > http://mail.scipy.org/mailman/listinfo/numpy-discussion _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
