Hi Henning,
Although there might be a better way to do this, I'd suggest (with
my.matrix being the matrix you provided):
complete.vector = rep(my.matrix[1,],my.matrix[2,]) ;
table(complete.vector) ;
Is this what you're looking for?
Cheers,
Luc
Hans-Henning Gabriel wrote:
Hi,
my problem is as follows:
I have a matrix of two rows like this:
2 2 3 4 4 4 5 5 6
1 1 2 1 3 3 2 1 1
Can I apply something like "group by" in sql? What I want to achieve
is the some of second row for each unique entry of first row:
2 -> 2 (=1+1)
3 -> 2
4 -> 7 (=1+3+3)
5 -> 3 (=2+1)
6 -> 1
Thanks!!
Henning
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