I need the cumlative sum of the second column of Data grouped by (or reset at each change in) the first column of Data please:

Data = [[1;1;1; 2;2;2; 3;3;3], [1;0;1; 0;1;1; 0;1;0]]

Answer = [Data, [1;1;2; 0;1;2; 0;1;1]]

Data =
1 1
1 0
1 1
2 0
2 1
2 1
3 0
3 1
3 0
Answer =
1 1 1
1 0 1
1 1 2
2 0 0
2 1 1
2 1 2
3 0 0
3 1 1
3 0 1I need the cumlative sum of the second column of Data grouped by (or reset at each change in) the first column of Data please:

Data = [[1;1;1; 2;2;2; 3;3;3], [1;0;1; 0;1;1; 0;1;0]]

Answer = [Data, [1;1;2; 0;1;2; 0;1;1]]

Data =
1 1
1 0
1 1
2 0
2 1
2 1
3 0
3 1
3 0
Answer =
1 1 1
1 0 1
1 1 2
2 0 0
2 1 1
2 1 2
3 0 0
3 1 1
3 0 1 I need the cumlative sum of the second column of Data grouped by (or reset at each change in) the first column of Data please:

Data = [[1;1;1; 2;2;2; 3;3;3], [1;0;1; 0;1;1; 0;1;0]]

Answer = [Data, [1;1;2; 0;1;2; 0;1;1]]

Data =
1 1
1 0
1 1
2 0
2 1
2 1
3 0
3 1
3 0
Answer =
1 1 1
1 0 1
1 1 2
2 0 0
2 1 1
2 1 2
3 0 0
3 1 1
3 0 1 cumsum, group by MATLAB Answers — New Questions

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