[Scilab-users] non linear optim

[Paul Bignier]

Hello David,

Do the examples <https://help.scilab.org/docs/6.0.0/en_US/leastsq.html> 
work? I need to know if the problem is related to your scripts or leastsq.
Could you please reduce to a minimal reproducible use-case and report it 
on the bugzilla <http://bugzilla.scilab.org>?

Regards,
Paul

On 03/20/2017 11:48 AM, David Chèze wrote:
> Hi,
>
> I'm running scilab 6.0 on WIN7_64 and I failed to run optimisation based on
> 'optim' functions (leastsq) while fminsearch performed well. The call in my
> code are summarized below :
>
> -----
> function RMSE=evaloptiM1D(X)
> ... calls to other macros to calculate the "cost"=RMSE returned value
> endfunction
>
> x0= [1.27 ; 0.8]
>
> [fopt, xopt]=leastsq(evaloptiM1D,x0)   //fail
>
> [x, fval]=fminsearch(evaloptiM1D,x0',opt)  //run ok
>
>
> ----------
> fminsearch returns successfully X = 1.22 0.77
> while
> leastsq starts then fails with :
>
> User function 'costf' have not been setted.
>
> Any idea about what it means and where it could comes from ?
>
> Thanks for your advice
>
>
> David
>   
>
>
>
>
> --
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-- 
Paul BIGNIER
Development engineer
-----------------------------------------------------------
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