Adding matrices rows having the same id
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Hello, I would like to sum rows of two matrices if they have the sam id (first column). For instance, I have a matrix A and matrix B:
A = [
1 4 5 6;
2 5 5 3;
3 9 8 2];
B = [
4 5 6 2;
2 9 4 1;
1 5 7 9;
3 5 6 7;
1 4 5 3];
I would like to get matrix C such that it looks at the first column and add the other columns if id is the same in both matrices.
C = [
1 13 17 18;
2 14 9 4;
3 14 14 9;
4 5 6 2];
Thank you
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