Non lenier equations in loop

G = 600:100:1200; x0=[300;300;300;300;300;300;300]; options=optimset('Display','off'); X(i) = NaN(1,length(G)); for i = 600:length(G) fsol = fsolve(@(x)solutionsproblem(x,G(i)),x0,options);

X(i) = fsol(1); end

function F =solutionsproblem(x,G) Tg1 = 300; Tg2 = 301.5; Ta = 305.8; Tl = 302; Tf = 302; Tb = 302; Th = 300; F(1) = 0.0425*G + 1.41*10^(-8)*x(2)^(4) + 1.34*x(2) - 9.12*10^(-9)*x(1)^(4) + 341 - 2402.77*x(1) + 2400*Tg1; F(2) = 0.0204*G - (3.48*10^(-8) + 4.35*10^(-10)*1)*x(2)^(4) + 1.41*10^(-8)*x(1)^(4) + 8.01*10^(-11)* x(4)^(4) + 2.43*10^(-8)*x(3)^(4) + 4.35*10^(-10)*1*x(5)^(4) + 0.55*x(3) + 1.34*x(1) - 2401.87*x(2) + 2400*Tg2; F(3) = 0.124*G - 4.88*10^(-8)*x(3)^(4) + 2.44*10^(-8)*1*x(2)^(4) + 2.44*10^(-8)*1*x(5)^(4)- 50.938*x(3) + 11.502*x(6) + 1.836* x(2) + 37.60*Ta; F(4) = 0.011*G - 8.70*10^(-8)*x(5)^(4) + 4.35*10^(-10)*x(3)^(4)+ 4.35*10^(-10)*x(2)^(4) + 0.83*x(6) + 0.112*x(3) + 0.112*x(2) - (1.055 + (112.7/1))*x(5) + (112.7/1)*Tf; F(5) = 2.17*10^(-3)*G - 1.6*10^(-10)*x(4)^(4) + 8.01*10^(-11)*x(7)^(4) + 8.01*10^(-11)*x(2)^(4) - 69.07*x(4) + 3.77*10^(-4)*x(7) + 0.02*x(3) + 0.02*x(2) + 69*Tl; F(6) = -52.068*x(6) + 0.412*x(3) + 0.368*x(4)+ 0.368*x(5) + 0.46*x(2) + 50.78*Tb; F(7)= 3.77*10^(-4)*x(4) + 8.01*10^(-11)*x(4)^(4) + 0.092*x(5) - 1254.1*x(7) - 8.01*10^(-11)*x(7)^(4) + 1254*Th; end

[John D'Errico]

What is your question? Does the code as written have a problem? Does it do what you wanted? If not, then what does it do (or not do)?

[darova]

The question is unclear for me. Can you be more specific?

[darova]

Can you format your code? It's hard to read

[darova]

Using this button

[Adithya Valavi]

I am getting eror on the 4th line And I don't know what to do

[darova]

what kind of error? Can you be more specific?