[Numpy-discussion] fancy view question
Tue Feb 17 09:01:21 CST 2009
On Tue, Feb 17, 2009 at 9:44 AM, Gael Varoquaux
> 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 :).
I completely agree.
I was looking at the help file and docs, and I didn't find it.
np.lib.stride_tricks.as_strided is not in np.lib.stride_tricks.__all__
and not in the docs. So it's still a hidden treasure.
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