Why the results of the matrix X' dont show?

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Ian Samuelsson
Ian Samuelsson 2021-9-20
回答： Stephen23 2021-9-20
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
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Ian Samuelsson
Ian Samuelsson 2021-9-20
because i'm trying to prove the values when x4=0, in the question they want to know the values of the matrix when x4=0 (is a trafic application, if the street x4 flow is zero, how this will afect the matrix).
i think that i exaggerated the arguments and got confused, thank you !
Ian Samuelsson
Ian Samuelsson 2021-9-20
put your answer in answer this question plz, soo can i give your tag

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采纳的回答

Stephen23
Stephen23 2021-9-20
Ran in:
Use https://www.mathworks.com/help/matlab/ref/mldivide.html
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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