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FMINUNC cannot continue help?

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EB
EB on 25 Oct 2019
Edited: EB on 26 Oct 2019
I am trying to learn how to use fminunc, but it gives the error "Failure in initial objective function evaluation. FMINUNC cannot continue."
Help please?
Note: Updated
for i = 1:modes
params.x0 = [y0 dy0];
params.xp = xspan;
fobj = @(beta)myobj(beta, params);
for j = 1:1000 % begin convergence loop for beta
beta = fminunc(fobj, beta0); % run optimization
end % end convergence loop
end
%%
function [err, T, Y] = myobj(beta)
x0 = params.x0;
xspan = params.xp;
[T,Y] = ode45('ffunc', xspan, x0);
err = abs(Y(end,2) + sqrt(K*L.^2 - beta)*Y(end,1)); % error
end

Accepted Answer

Matt J
Matt J on 25 Oct 2019
Edited: Matt J on 25 Oct 2019
You forgot to pass your params,
fobj = @(beta)myobj(beta,params);
function [err, T, Y] = myobj(beta,params)
x0 = params.x0;
xspan = params.xp;
[T,Y] = ode('ffunc', xspan, x0);
err = abs(Y(end,2) + sqrt(K*L.^2 - beta)*Y(end,1)); % error
end
  4 Comments
EB
EB on 25 Oct 2019
Still the same error.

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