prod - product
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(i)=prod(x(i,:)) .
y=prod(x,'c') (or, equivalently, y=prod(x,2) ) computes the columns elementwise product of x . y is the column vector: y(i)=prod(x(:,i)) .
prod is not implemented for sparse matrices.
A=[1,2;0,100]; prod(A) prod(A,'c') prod(A,'r')