Adding rows with constraint

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Bathrinath
Bathrinath 2014-1-9
回答： David Sanchez 2014-1-9
a=[10,11,8; 6,5,7; 4,6,5; 0,0,5]; output=[10,11,8; 16,16,15; 20,22,20; 0,0,25];
First row should be as it is, in the second row elements should be added, in the third row also elements should be added but in the final row if '0' is there that column should not be added column with out '0' has to be added.

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采纳的回答

dpb
dpb 2014-1-9
b=cumsum(a);
b(a==0)=0;

更多回答（1 个）

David Sanchez
David Sanchez 2014-1-9
a=[
10,11,8;
6,5,7;
4,6,5;
0,0,5];
output = zeros(size(a));
output(1,:) = a(1,:);% First row should be as it is
output(2,:) = sum(a(1:2,:),1); % the second row elements should be added
output(3,:) = sum(a(1:3,:),1);
output(4,:) = sum(a(1:4,:),1).*(a(4,:)~=0);% final row if '0' is there that column should not be added column with out '0' has to be added.
>> output
output =
10 11 8
16 16 15
20 22 20
0 0 25

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