How to get sum of all the order values for a given id of a column in matrix
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Mitul saraiya
on 19 Dec 2014
Commented: Mitul saraiya
on 20 Dec 2014
i have 2 columns and 10 rows
1 10
2 29
2 34
2 79
3 11
3 20
3 11
4 9
4 1
5 10
i want the add numbers having same value in first column The answer i want is using loop or any other operation
1 10
2 142
3 42
4 10
5 10
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Accepted Answer
Azzi Abdelmalek
on 19 Dec 2014
Edited: Azzi Abdelmalek
on 19 Dec 2014
A=[1 10;2 29;2 34;2 79;3 11;3 20;3 11;4 9;4 1;5 10]
out=[unique(A(:,1)) accumarray(A(:,1),A(:,2))]
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