Solve the given system of equations using the Gauss-Jordan elimination method with MATLAB.

How can i solve this 4x4 equations using the Gauss-Jordan elimination with MATLAB/octave?

Answer 1

[KSSV]

Read about rref

A = [0.1 -2.5  1.2 -0.75  108 ; 
     2.4  1.5 -1.8  0.25 -81;
     0.4 -3.2  1.6 -1.4   148.8; 
     1.6  1.2 -3.2  0.6   -143.2] ;
[R,p] = rref(A) ;
R(:,end)

ans = 4×1

10 -20 40 -12

% Check 
A(:,1:4)*R(:,end)

ans = 4×1

108.0000 -81.0000 148.8000 -143.2000