Parameters

Description

For a vector or a matrix x, y=prod(x) returns in the scalar y the prod of all the entries of x, , e.g. prod(1:n) is n!

y=prod(x,'r') (or, equivalently, y=prod(x,1))computes the rows elementwise product of x. y is the row vector: y(1,j)=prod(x(:,j)).

y=prod(x,'c') (or, equivalently, y=prod(x,2)) computes the columns elementwise product of x. y is the column vector: y(i,1)=prod(x(i,:)).

y=prod(x,'m') is the product along the first non singleton dimension of x (for compatibility with Matlab).

prod is not implemented for sparse matrices.

Examples

 
A=[1,2;0,100];
prod(A)
prod(A,'c')
prod(A,'r')
   

See Also