Hi all, I'm trying to write an m-file which will compute a solution matrix given a coefficient matrix and right hand side vector using cramer's rule.. which is no problem for a specified size matrix.. but is it possible to write an m-file which computes the solution when ANY square coefficient matrix and it's right hand side vector is entered? I guess you would need some kind of loop... but i'm not sure how to write the code to have matlab substitute the right hand side vector for a different column in the co-efficient matrix for each term... any suggestions?
here is a row/column selector the rest is looping and det function. r and c is the number of row/column that you cancel of the matrix A, Ac is the result that you get. Code (Text): function [Ac] = cancelrowcol(A,r,c) [n,m] = size(A); % Shortcut to upper left and lower right corner... if ((r == 1) && (c ==1)) Ac = sel(A,2:n,2:m); return elseif ((r == n) && (c == m)) Ac = sel(A,1:n-1,1:m-1); return % Otherwise else Atemp = vertcat(sel(A,1:(r-1),1:m),sel(A,(r+1):n,1:m)); Ac = horzcat(sel(Atemp,1:(r-1),1:(c-1)),sel(Atemp,1:(r-1),(c+1:m))); end end