FMINUNC cannot continue help?

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EB
EB 2019-10-25
编辑： EB 2019-10-26
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

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采纳的回答

Matt J
Matt J 2019-10-25
编辑：Matt J 2019-10-25
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
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EB
EB 2019-10-25
It just says fobj used twice, but that is correct because I need to state my fobj, then use it for the next part.
EB
EB 2019-10-25
Still the same error.

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