Why the results of the matrix X' dont show?

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Ian Samuelsson
Ian Samuelsson on 20 Sep 2021
Answered: Stephen on 20 Sep 2021
I'm just trying to prove if x4 = 0 the matrix X' will be [100+0 -400+0 -500+0 0], but i only recive red flags :(, someone know what i did wrong to fix it ?
A = [0 2 -1 0 ; 0 0 1 -1 ; 1 -1 0 0 ; -1 0 0 1]
B= [100 -500 300 100]
X = inv(A)*B
for x4 = 0:1:100
X' =[-100+x4 -400+x4 -500+x4 x4]
if X'=X
break
end
end
  3 Comments
Ian Samuelsson
Ian Samuelsson on 20 Sep 2021
put your answer in answer this question plz, soo can i give your tag

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Accepted Answer

Stephen
Stephen on 20 Sep 2021
A = [0,2,-1,0;0,0,1,-1;1,-1,0,0;-1,0,0,1];
B = [100;-500;300;100];
X = A\B % more robust than INV(A)*B
X = 4×1
300 0 -100 400

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