[R] Working with Matrix
Christofer Bogaso
bogaso.christofer at gmail.com
Fri Jan 4 12:47:40 CET 2013
Hello again,
Let say I have 2 matrices which equal number of columns but different
number of rows like:
Mat1 <- matrix(1:20, 4, 5)
Mat2 <- matrix(1:25, 5, 5)
Now for each column 1-to-5 I need to fetch the corresponding columns
of these 2 matrices and add the corresponding elements (ignoring NA
values if any). Therefore for the 1st column I need to do:
(1+1), (2+2),...,(4+4), (NA+5)
and so on
And the resulting numbers will be stored in some other matrix
Also note that, here I gave the example of addition, however, this can
be any user defined function.
Is there any R way to do that, without using any for-loop?
Thanks and regards,
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