I am supposed to create a MATLAB code for calculating the matrix for 2*2, 3*3, 4*4 matrices but somehow my codes have errors. Does anyone know how to fix this? Is my implementation/algorithm okay or am I doing something completely wrong? Please correct me and explain how to do it right. Thank you.

A = input("Enter matrix:");

function D = Determinant(A)

[i,j] = size(A);

if i ~= j %d = 'ERROR'; disp('The matrix must be square.') elseif i > 4 %d = 'ERROR'; disp('Solution for a 4 by 4 matrix is not available.') elseif i == 2 D=det2by2(A); elseif i == 3 D=det3by3(A);

elseif i == 4 D=det4by4(A); end

function D4=det4by4(A) X1=A(2:4,2:4); X2=A(2:4,[1 3 4]); X3=A(2:4,[1 2 4]); X4=A(2:4,1:3); D4 = A(1,1)*det3by3(X1)-A(1,2)*det3by3(X2)+A(1,3)*det3by3(X3)-A(1,4)*det3by3(X4); function D3=det3by3(A) X5=A(2:3,2:3); X6=A(2:3,[1 3]); X7=A(2:3,1:2); D3 = A(1,1)*det2by2(X5)-A(1,2)*det2by2(X6)+A(1,3)*det2by2(X7); function D2=det2by2(B) D2 = B(1,1)*B(2,2)-B(1,2)*B(2,1); end end end

end