how to solve this error in lsqnonlin of optim tool?: LSQNONLIN requires all values returned by user functions to be of data type double
9 ビュー (過去 30 日間)
古いコメントを表示
I am trying to use lsnonlin from optimtool for a function I have written. I am providing the function, the start point (as: [2.5*10^7 8*10^9 1.2*10^7 1.9*10^10 91287 169948 105280 152388]) and the lower and upper bounds. when I am hitting start, it gives me this error: Error running optimization. LSQNONLIN requires all values returned by user functions to be of data type double.
Can you please help me to solve this problem. If you could say what should I change in this code, it would be great. Below is my function:
function y=harman(x,data)
format long
j=1;
for T=[453 493 523]
ydata = [0.75;0.70;0.64;0.61;0.72;0.68;0.62;0.58;0.70;0.65;0.59;0.53];
R=8.13;
%Arhenious equations to relate inputs and guesses
empty=[];
k=repmat(empty,4,1);
for i=1:4
k(i)=x(i)*(exp(-1*x(i+4)/(R*T)));
end
k1=k(1);
k2=k(2);
k3=k(3);
k4=k(4);
syms a(t) b(t) c(t) d(t) e(t)
eqn1=diff(a)==(-1*(k1+k3)*a);
eqn2=diff(b)==(k1*a)-((k2+k4)*b);
eqn3=diff(c)==(k2*b);
eqn4=diff(d)==(k3*a);
eqn5=diff(e)==(k4*b);
c1=a(0)==1;
c2=b(0)==0;
c3=c(0)==0;
c4=d(0)==0;
c5=e(0)==0;
S=dsolve(eqn1, eqn2, eqn3, eqn4, eqn5, c1, c2, c3, c4, c5);
dSol(t)=S.d;
eSol(t)=S.e;
for t=[900 2400 5400 7200]
z(j)=abs(ydata(j)-(1-(dSol(t)+eSol(t))));
j=j+1;
end
end
y=sum(z.^2);
end
Thanks, Mohammad
0 件のコメント
採用された回答
Matt J
2018 年 7 月 20 日
You are doing various symbolic manipulations. Are you sure that z evaluate to a numbers? If so, just convert
y=double( sum(z.^2) );
8 件のコメント
その他の回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Get Started with Optimization Toolbox についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!