Kod: Zaznacz cały
function xyz ()
K=[5 2 1 1 0;
4 10 2 -3 -1;
0 2 8 2 1;
1 1 2 9 3;
0 0 4 2 8];
disp('Wynik z biblioteki Matlaba:')
disp(inv(K))
disp('Wynik uzyskany metodą Gaussa:')
[invK]=metodaGaussa(K)
end%function
function [invK]=metodaGaussa(K)
[m,n]=size(K);
B=[1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1];
for k=1:n
for i=k+1:n
m(i,k)=K(i,k)/K(k,k);
for j=k+1:n
K(i,j)=K(i,j)-m(i,k)*K(k,j);
end%for
for j=1:n
B(i,j)=B(i,j)-m(i,k)*B(k,j);
end%for
end%for
end%for
invK=wstecz(K,B);
end%function
function X=wstecz(K,B)
n=length(K);
for l=1:n
for i=n:-1:1
s=0;
for j=i+1:n
s=s+K(i,j)*X(j,l);
end%for
X(i,l)=(B(i,l)-s)/K(l,i);
end%for
end%for
X
end%function