array within an array sort python numpy

Asked Jun 02 '17 at 22:08

Active Jun 02 '17 at 22:11

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Python newbie.. this might be fairly straight-forward.. I tried looking through the other questions but no luck..

I have a nd array that looks like this:

pos=[[[567 341 741 450]]

[[803 513 839 538]]

[[733 446 881 539]]

[[656 411 800 512]]

[[513 308 534 324]]

[[579 356 602 373]]

[[549 335 576 355]]

[[558 335 608 366]]]

I want to do a sort based on the first column inside the array..Basically [[513 308 534 324]] should be the first element.. How do I go about it ?

edited Jun 02 '17 at 22:11

Ozgur Vatansever

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asked Jun 02 '17 at 22:08

mulshankar

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`sorted(pos, key=operator.itemgetter(0))` – Ozgur Vatansever Jun 02 '17 at 22:13
@OzgurVatansever This question is about a numpy array, not a Python list. – Jun 02 '17 at 22:21
@Gerry doesn't matter. Solutions both I proposed and the ones in the duplicate work for `np.array` types as well. – Ozgur Vatansever Jun 02 '17 at 22:28
https://stackoverflow.com/questions/2828059/sorting-arrays-in-numpy-by-column – Matt Jun 02 '17 at 22:32

array within an array sort python numpy

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