Could anyone help me with an anonymous function trouble please?!

I am straggling to have this code work!

myfun = @(x1,x2) ((x1 - 2).^4 + (x1 - 2*x2).^2 + (x1.^2 - x2).^2); fminsearch(my fun, [2.0, 1.0]);

could anyone help please!

Answer 1

[James Tursa]

Make the argument of myfun a vector. E.g.,

myfun = @(x) ((x(1) - 2).^4 + (x(1) - 2*x(2)).^2 + (x(1).^2 - x(2)).^2);
fminsearch(myfun, [2.0, 1.0])

ans =

      1.1687    0.7407

Answer 2

[Guillaume]

The function that you pass to fminsearch takes a single vector/matrix as input instead of several variables. Therefore:

 myfun = @(x) ((x(1) - 2).^4 + (x(1) - 2*x(2)).^2 + (x(1).^2 - x(2)).^2);
 fminsearch(myfun, [2 1])