daily pastebin goal
13%
SHARE
TWEET

Untitled

a guest Nov 22nd, 2017 51 Never
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
  1. function [ det ] = determinant( matrix )
  2. [r,c] = size(matrix);
  3. if r ~= c % Invalid matrix
  4.     disp('Error, matrix must be square');
  5. end
  6. if r == 1 % Base case size 1x1
  7.     det = matrix(1);
  8. elseif r == 2 % Base case size 2x2
  9.     det = matrix(1,1) * matrix(2,2) - matrix(1,2) * matrix(2,1);
  10. else
  11.     det = 0;
  12.     for i=1:r
  13.         sub = matrix(:,2:end); % Make copy of matrix, remove first column
  14.         sub(i,:) = []; % Remove row i from reduced matrix
  15.         if mod(i, 2) == 0 % Even indices are subtracted
  16.             det = det - matrix(i,1) * determinant(sub); % Subtract subdeterminant from summation
  17.         else % Odd indices are added
  18.             det = det + matrix(i,1) * determinant(sub); % Add subdeterminant to summation
  19.         end
  20.     end
  21. end
  22. end
RAW Paste Data
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. OK, I Understand
 
Top