Thanks all I was being dumb and forgot to initialize as array() Cheers Ross On Dec 10, 2008, at 11:47 AM, Sturla Molden wrote:
On 12/10/2008 5:38 PM, Ross Williamson wrote:
Hi Everyone
I think I'm missing something really obvious but what I would like to do is extract the indexes from an array where a number matches - For example
data = [0,1,2,960,5,6,960,7]
I would like to know, for example the indices which match 960 - i.e. it would return 3 and 6
import numpy a = numpy.array([0,1,2,960,5,6,960,7]) a == 960 array([False, False, False, True, False, False, True, False], dtype=bool) idx, = numpy.where(a == 960) idx array([3, 6]) idx.tolist() [3, 6]
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