Hi all,
I have 2 columns in a mtrix, one of which is a column of probabilities and
the other is simply a vector of integers. I want to sum all the
probabilities with the same integer value and put it in a new column.
For example,
If my matrix is:
0.98 2
0.2 1
0.01 2
0.5 1
0.6 6
Then I should get:
0.98 2 0.99
0.2 1 0.70
0.01 2 0.99
0.5 1 0.70
0.6 6 0.60
Any help is greatly appreciated.
--
Thanks,
Jim.
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