Write your own code to perform matrix multiplication. Recall that to multiply two matrices, the inner dimensions must be the same

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mymatmult.m

function C = mymatmult(A,B)

% mymatmult performs matrix multiplication

% It returns an empty vector if the matrix

% multiplication cannot be performed

% Format: mymatmult(matA, matB)

[m, n] = size(A);

[nb, p] = size(B);

if n ~= nb

 C = [];

else

 % Preallocate C

 C = zeros(m,p);

 % Outer 2 loops iterate through the elements in C

 % which has dimensions m by p

 for i=1:m

 for j = 1:p

 % Inner loop performs the sum for each

 % element in C

 mysum = 0;

 for k = 1:n

 mysum = mysum + A(i,k) * B(k,j);

 end

 C(i,j) = mysum;

 end

 end

end

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