[ADMB Users] "Hessian does not appear to be positive definite"

[Sylvain Bonhommeau]

Hi,

Thanks for your answer. That's what I did or tried to do and that's the
results for the dataset with known parameters.  Here are the .tpl, .pin and
.dat files.

Thanks a bunch,

Sylvain

2009/4/9 dave fournier <otter at otter-rsch.com>

> Hi,
>
> I think there is a bit lost in translation here.
>
> >I fixed the parameters and simulate Y to test the ADMB script. The
> >retrieved
> >parameters have exactly (and amazingly!) the same values as I fixed
> >(which
> >is not the case when using optim function in R or fminsearch in matlab and
> >it's much longer).
>
> Do you mean the you used known parameters to simulate some data and then
> fit the data and got the parameters back.  Is that the same data set
> for which the results you posted here are from?  anyway if you send me
> the tpl file and every thing needed to run the model I'll take a look at
> it.
>
>     Dave
>
>
> --
> David A. Fournier
> P.O. Box 2040,
> Sidney, B.C. V8l 3S3
> Canada
> Phone/FAX 250-655-3364
> http://otter-rsch.com
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