prod - Product of array elements

Syntax

Description

B = prod(A) returns the products along different dimensions of an array. A can be double or single. B is multiplied natively, that is in the same class as A, and B has the same class as A.

If A is a vector, prod(A) returns the product of the elements.

If A is a matrix, prod(A) treats the columns of A as vectors, returning a row vector of the products of each column.

If A is a multidimensional array, prod(A) treats the values along the first non-singleton dimension as vectors, returning an array of row vectors.

B = prod(A,dim) takes the products along the dimension of A specified by scalar dim.

B = prod(A,'double') multiplies B in double and B has class double, even if A is single.

B = prod(A,'native') multiplies B natively and B has the same class as A.

Examples

The magic square of order 3 is

M = magic(3)

M = 
    8    1    6
    3    5    7
    4    9    2 

The product of the elements in each column is

prod(M) =
 
    96    45    84 

The product of the elements in each row can be obtained by:

prod(M,2) = 

     48
    105
     72

See Also

cumprod | diff | sum

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