MATLAB: How to find product of any matrix A

matrixproduct

I currently have the below as my function that I created to try and find the product of any matrix A. When I run the function, it keeps telling me that B is not inside any function. I don't know if I should change my function or what else I should do to fix the problem.
function prod=MatProd(A)
    prod=1;
    [m,n]=size(A);
    for i=1:1:m
        for j=1:1:n
            prod=prod*A(i,j);
        end
    end
end
B=[12.2, 1.2, 2.4; 2,3,4; 2.5, 6.2,3.4];
MatProd(B)

Best Answer

Put the function definition
function prod=MatProd(A)
    prod=1;
    [m,n]=size(A);
    for i=1:1:m
        for j=1:1:n
            prod=prod*A(i,j);
        end
    end
end
in a file named MatProd.m, and then call it using
B=[12.2, 1.2, 2.4; 2,3,4; 2.5, 6.2,3.4];
MatProd(B)
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