[Numpy-discussion] np.choose() question
Andreas Hilboll
lists@hilboll...
Tue Jun 8 11:24:51 CDT 2010
Hi there,
I have a problem, which I'm sure can somehow be solved using np.choose()
- but I cannot figure out how :(
I have an array idx, which holds int values and has a 2d shape. All
values inside idx are 0 <= idx < n. And I have a second array times,
which is 1d, with times.shape = (n,).
Out of these two arrays I now want to create a 2d array having the same
shape as idx, and holding the values contained in times, as indexed by
idx.
A simple np.choose(idx,times) does not work (error "Need between 2 and
(32) array objects (inclusive).").
Example:
idx = [[4,2],[3,1]]
times = [100,101,102,103,104]
From these two I want to create an array
result = [[104,102],[103,101]]
How can this be done?
Thanks a lot for your insight!
Andreas
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