Inverse matrix with for loop
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Using for loops, program a general code for calculating the inverse of a given matrix in the 2X2 and 3X3 cases.
Can someone help me? I'm learning to use the for loop and I don't know how to do that.
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Answers (1)
Doddy Kastanya
on 6 Jan 2021
The way you prepare the cofactor is okay. You want to define your "k=transpose(c)" outside of the loop. The other thing that you need to remember is the intrinsic function "det" is to determine the determinant of a matrix. Applying it on an element of a matrix will just give you the element back. So, your code should look something like:
c=[c1, c3;c2, c4];
k=transpose(c); % or you could simply use k=c';
denum=det(C);
for i=1:m
for j=1:n
z(i,j)=1/denum*k(i,j);
end
end
The same principal is applicable for a 3x3 matrix. You just need to be careful in defining the cofactors (including the "+" and "-" signs). Good luck.
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