Re: optim package question

[Olaf Till]

On Sun, Jun 30, 2019 at 03:26:47PM +0000, Tso-min Chou wrote:
>  Hi Olaf,
> Thanks for the information. I looked at the optim_doc and it seems I
> can still use both optimset and lsqnonlin in Octave as in
> Matlab. But when I ran the code the error message points the issue
> is in function lsqnonlin.   error: Invalid call to lsqnonlin. 
> Correct usage is:  -- Function File: lsqnonlin (FUN, X0) -- Function
> File: lsqnonlin (FUN, X0, LB, UB) -- Function File: lsqnonlin (FUN,
> X0, LB, UB, OPTIONS) -- Function File: [X, RESNORM, RESIDUAL,
> EXITFLAG, OUTPUT, LAMBDA,          JACOBIAN] = lsqnonlin (...)error:
> called from    print_usage at line 91 column 5    lsqnonlin at line
> 184 column 5    Octave_ECP_optim at line 234 column 64 >From the
> original code [XOut,ErrorTotal,ErrorPartial] =
> lsqnonlin('FETProcess_mod2a_Shuoqi',XGuess,XMin,XMax,options,Freq,SMeas,Scale)
> 
> I am not sure where I did run to call the function it looks correct to me.
> Best Regards,
> TsoMin

lsqnonlin in optim accepts only 5 arguments, so your 'Freq', 'SMeas',
and 'Scale' are two much for it. I don't find anything in Matlabs
lsqnonlin documentation saying that more than 5 arguments are
accepted. Can you give me a pointer to such information?

Also, it seems that lsqnonlin accepts only a function handle as the
first argument, not a name of a function. This is a bug (which can be
easily fixed, I'll do this soon), since according to Matlab
documentation a name of a function should be accepted, too.

Olaf

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