[R] extract cells by columns/rows from matrix

From: Nicolas Gutierrez <nicolasg_at_u.washington.edu>
Date: Thu, 14 Apr 2011 12:38:34 -0700 (PDT)

Hi All,

I have the following matrix Ufi (x by y):

> Ufin

      1 2 3 4 5 6 7 8 9 10
   1 0 0 0 0 0 0 0 0 0 0
   2 0 0 0 0 0 0 0 0 0 0
   3 0 0 0 0 0 0 0 0 0 0
   4 0 0 0 6 0 0 0 0 0 0
   5 0 0 0 0 0 0 0 0 0 0
   6 0 0 0 0 0 0 9 0 0 0
   7 0 2 0 0 0 0 0 0 0 0
   8 0 0 0 0 0 0 0 0 0 0
   9 0 0 0 0 0 0 0 1 0 0
   10 0 0 0 0 0 0 0 0 0 0

And I need to extract the values for x and for y of those cells with maximum values:

First would be:

x=7; y=6

Second:

x=4; y=4

And so on... Any help?

Thanks!

Nic



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