[R] cumsum

[threshold]

Hi, my problem belongs to the basic ones. I want to get cumulated sum over
the matrix columns by one command (if such exists). Ordinary R's cumsum(x)
when x is:
     [,1] [,2]
[1,]    1    5
[2,]    2    6
[3,]    3    7
[4,]    4    8

yields:  1  3  6 10 15 21 28 36
I want:
     [,1] [,2]
[1,]    1    5
[2,]    3   11
[3,]    6   18
[4,]   10   26
Is there any command to do so??

best, robert



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