MATLAB Function Reference

cumprod - Cumulative product

Syntax

B = cumprod(A)
B = cumprod(A,dim)

Description

B = cumprod(A) returns the cumulative product along different dimensions of an array.

If A is a vector, cumprod(A) returns a vector containing the cumulative product of the elements of A.

If A is a matrix, cumprod(A) returns a matrix the same size as A containing the cumulative products for each column of A.

If A is a multidimensional array, cumprod(A) works on the first nonsingleton dimension.

B = cumprod(A,dim) returns the cumulative product of the elements along the dimension of A specified by scalar dim. For example, cumprod(A,1) increments the column index, thus working along the columns of A. Thus, cumprod(A,1) and cumprod(A) will return the same thing. To increment the row index, use cumprod(A,2).

Examples

cumprod(1:5)
ans =  
     1  2  6  24  120

A = [1 2 3; 4 5 6];

cumprod(A,1)
ans = 
     1     2     3
     4    10    18

cumprod(A,2)
ans = 
     1     2     6
     4    20   120

See Also

cumsum, prod, sum

ctranspose (timeseries)

cumsum