Cumulative product

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 first (row) index, thus working along the rows of A.

Examples

• cumprod(1:5)
  ans = 
       1  2  6  24  120
  
  A = [1 2 3; 4 5 6];
  
  cumprod(A)
  ans =
       1     2     3
       4    10    18
  
  cumprod(A,2)
  ans =
       1     2     6
       4    20   120