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- cumsum:
-
- Syntax: cumsum ( A )
-
- Description:
-
- cumsum computes the running, or cumulative sum of a vector or
- matrix. The return object is a matrix the same size as the
- input, A. If A is a rectangular matrix, then the cumulative
- sums are performed over the columns of the matrix.
-
- Example:
-
- > a = 1:4
- a =
- 1 2 3 4
- > cumsum(a)
- 1 3 6 10
- > a= [1,2,3;4,5,6;7,8,9]
- a =
- 1 2 3
- 4 5 6
- 7 8 9
- > cumsum (a)
- 1 2 3
- 5 7 9
- 12 15 18
-
- See Also: cumprod, prod, sum
-