how to reduce 2d array

Posted by owca on Stack Overflow See other posts from Stack Overflow or by owca
Published on 2010-03-08T01:59:15Z Indexed on 2010/03/08 2:12 UTC
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I have a 2d array, let's say like this :

2   0   8   9
3   0  -1  20
13  12  17  18
1   2   3   4
2   0   7   9

How to create an array reduced by let's say 2nd row and third column?

2   0    9
13  12   18
1   2    4
2   0    9

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