[Numpy-discussion] Find index of repeated numbers in array

Ross Williamson rw247@astro.columbia....
Wed Dec 10 10:38:11 CST 2008

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  

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

I could do this with a loop but I was wondering if there was a built  
in numpy function to do this?

BTW if anyone is interested I'm converting some idl code to numpy and  
trying to mmic the IDL function where



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