Charles R Harris wrote: > On Wed, Mar 7, 2012 at 1:05 PM, Neal Becker <ndbeck...@gmail.com> wrote: > >> I'm wondering what is the use for the ignored data feature? >> >> I can use: >> >> A[valid_A_indexes] = whatever >> >> to process only the 'non-ignored' portions of A. So at least some simple >> cases >> of ignored data are already supported without introducing a new type. >> >> OTOH: >> >> w = A[valid_A_indexes] >> >> will copy A's data, and subsequent use of >> >> w[:] = something >> >> will not update A. >> >> Is this the reason for wanting the ignored data feature? >> > > Suppose you are working with plotted data and want to turn points on/off by > clicking on them interactively to see how that affects a fit. Why make > multiple copies, change sizes, destroy data, and all that nonsense? Just > have the click update the mask and redraw. > > Chuck
But does some_func (A[valid_data_mask]) actually perform a copy? _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion
