cumsum

Cumulative sum of array elements.

Syntax

• R = cumsum(M)
• R = cumsum(M, d)
• R = cumsum(M, d, direction)
• R = cumsum(M, d, direction, nanflag)

Input argument

• M - an array of double, single, integers, ...
• d - dimension to operate along: positive integer scalar.
• direction - a string: 'reverse', 'forward' (default).
• nanflag - a string: 'includenan' (default) or 'omitnan'.

Output argument

• R - Cumulative Sum of array elements.

Description

R = cumsum(M) returns the cumulative sum of the array elements of M.

Example

M = uint8([10:30:70;20:30:80;30:30:90]);
R = cumsum(M)
R = cumsum(M, 'reverse')

See also

ndims, sum, cumprod.

History

Author

Allan CORNET