Exactly what I need - thank you very much. Ruby
On Thu, Jan 19, 2012 at 11:33 PM, Benjamin Root <ben.r...@ou.edu> wrote: > > > On Thursday, January 19, 2012, Ruby Stevenson <ruby...@gmail.com> wrote: >> hi, all >> >> I am a newbie on numpy ... I am trying to figure out, given an array, >> how to get back position value based on some conditions. >> Say, array([1, 0, 0, 0 1], and I want to get a list of indices where >> it is none-zero, [ 0 , 4 ] >> >> The closest thing I can find from the doc is select(), but I can't >> figure out how to use it properly. >> >> Thanks for your help. >> >> Ruby >> > > np.nonzero() > > Note that you typically use it with a Boolean array result like "a >= 4". > Also note that it returns a tuple of index lists, on for each dimension. > This can the be feed back into the array to get the values as a flat array. > > Ben Root > _______________________________________________ > 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
