[ADMB Users] difference between ADMB-RE and R/mgcv in SEs for smoother coefficients in a GAM fitted by maximum likelihood

[Tim Miller (NOAA Federal)]

Yes, Hans is correct. This does fix the covariance issue for my problem. 
Many thanks to Hans and Dave for sorting this out and so rapidly at that.

Best,
Tim


On 11/29/2012 5:28 PM, H. Skaug wrote:
> Thanks. That seems to solve the problem, both for
> my simple example and Tim's original example (but
> it would be good if Tim could verify  himself).
>
> I will submit this to the source base, but until the next
> release of ADMB is out people must include
> the attached file in their tpl, using:
>
> GLOBALS_SECTION
>    #include "getbigs.cpp"
>
> (I know this is not the best way of doing it, but it
> is the quickest).
>
> Hans
>
>
> On Thu, Nov 29, 2012 at 10:53 PM, dave fournier<davef at otter-rsch.com>  wrote:
>> OK that helped.  Around line 72 in getbigs.cpp I beleive the sign is wrong.
>> It should be
>>
>>
>>     uhat_prime=-minv*Dux;
>>
>> This corresponds to   uhat'(x) = - (L_uu)^{-1} L_xu
>>
>>
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