On Tue, Feb 17, 2009 at 08:44, Gael Varoquaux <gael.varoqu...@normalesup.org> wrote: > On Tue, Feb 17, 2009 at 04:42:21PM +0200, Stéfan van der Walt wrote: >> Or, more generally: > >> import numpy as np > >> def zoom(x, factor=2): >> rows, cols = x.shape >> row_stride, col_stride = x.strides >> view = np.lib.stride_tricks.as_strided(x, >> (rows, factor, cols, factor), >> (row_stride, 0, col_stride, 0)) >> return view.reshape((rows*factor, cols*factor)) > > That's handy, you should commit this somewhere. Actually, it would be > even cooler if you could have different zoom factor in different > direction :).
np.repeat(np.repeat(x, 2, axis=0), 2, axis=1) stride_tricks are fun, but this is already a solved problem in numpy. -- Robert Kern "I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth." -- Umberto Eco _______________________________________________ Numpy-discussion mailing list Numpy-discussion@scipy.org http://projects.scipy.org/mailman/listinfo/numpy-discussion
