Unrecognized function or variable 'seccionAurea'.

function powellmethod

max=0;

f=@(x1,x2) 25*(x1)^2+2.5*(x2)^2+15*(x1)*(x2)-25*(x1)-10*(x2);

grad={@(x1,x2) 50*(x1)+15*(x2)-25; @(x1,x2) 5*(x2)+15*(x1)-10};

x0=[2;2];

tol=0.045;

Maxiter=100;

bk=5;

n=size(x0,1);

iter=1;

D=eye(n);

y1=x0;

k=1;

j=1;

d=zeros(n,1);

alpha=0;

Fgrad=[grad{1}(y1(1),y1(2)); grad{2}(y1(1),y1(2)) ] ;

Da(iter,:)={iter, x0 , d ,alpha,Fgrad,x0};

iter=iter+1;

while norm(Fgrad)>tol && iter<=Maxiter

d=-D*Fgrad;

[alpha]=seccionAurea(f,x0,d,bk,max)

x1=x0+alpha*d;

y1=x1;

Fgrad=[grad{1} y1(1) ,y1(2);

grad{2} y1(1),y1(2)];

Da(iter,:)={iter,x0 , d , alpha , Fgrad, x1};

x0=x1;

if norm(Fgrad)<tol

break

end

p=Da{iter,4}*Da{iter,3};

q=Da{iter,5}*Da{iter-1,5};

D=D+((p*p')/(p'*q))-((D*q*q'*D)/(q'*D*q));

iter=iter+1;

end

code gives error when run it , same code work in my teacher laptop but gives me an error ,code is %100 same with teacher

Answer 1

[Tarunbir Gambhir]

On your teachers machine, use "which" function to locate where the function "seccionAurea" is defined.

which seccionAurea

Make sure that this file is on the MATLAB path for your machine. Refer to this question for how to set path for user defined functions.