how to solve 3 equations with 2 unknowns in matlab?

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vinod kumar govindu 2017-1-20

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评论： Andrei Bobrov 2017-1-20

采纳的回答： Torsten

eqn1=F*125.9-G*355.4==12;

eqn2=-F*251.8-G*125.9==16;

eqn3=F*125.9+G*355.4==13;

i want to find out values of F and G from above equations. Is there any commands in matlab for solving this equations?. Help me to solve this in matlab?

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Torsten 2017-1-20

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Of course you won't get a solution that exactly solves all three equations.

But you will get a "best" solution in the least-squares sense if you set

A=[125.9 -355.4;-251.8 -125.9; 125.9 355.4];
b=[12; 16; 13];
[F; G]=A\b;

Best wishes

Torsten.

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vinod kumar govindu 2017-1-20

Thank you for your response torsten. But it was showing error like

??? Error using ==> mldivide Too many output arguments.

Error in ==> G5 at 51

[F,G]=A\B;

Andrei Bobrov 2017-1-20

在 MATLAB Online 中打开

FG = A\b;
F = FG(1);
G = FG(2);

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