[ADMB Users] a difference in estimates between versions?

[Weihai Liu]

Hi Derek,
Sorry for my previous runs which has big gradient and hit the max function
evaluation and being ignored by me.

I rerun the ADMB catage example, which agreed on the same results on windows
32 bits ADMB 9.0 and latest source built ADMB 10.1, also on ubuntu 64 bits
latest built. So the problem is coming from his model, there is nothing
related with ADMB.

weihai

On Wed, Oct 5, 2011 at 3:07 PM, Weihai Liu <liuweih at msu.edu> wrote:

> Hi Derek,
> 1) Windows32bit with ADMB 9.0 get results
>  index   name   value      std.dev
>      1   r   5.0174e-001    7.1722e-002
>      2   B1  8.9945e+004 1.3305e+004
>      3   K   9.0813e+004 7.5575e+003
>      4   lnq -2.1667e+000 1.8993e-001
>
> 2) Windows32bit with latest built (this Sept., after subversion 128) get
> results
>  index   name   value      std.dev
>      1   r   4.9970e-001 7.2940e-002
>      2   B1  8.9504e+004 1.3599e+004
>      3   K   9.1202e+004 7.9562e+003
>      4   lnq -2.1695e+000 1.9095e-001
>
>
> 3) Ubuntu 64bit with latest built get hessian not positive definite warning
> with no std file.
>
> 3) Not run for windows 64 bit with latest built yet (on my home computer,
> if nobody run it, I will add that later).
>
> weihai
>
>
> On Wed, Oct 5, 2011 at 2:27 PM, Derek Seiple <dseiple84 at gmail.com> wrote:
>
>> I ran Saang-Yoon's attached example on 32-bit ubuntu with version 9.1,
>> 10.1, and the latest version with bug fixes. In ALL THREE I got the
>> following .std file.
>>
>>  index   name   value      std dev
>>      1   r    4.9790e-01 4.4611e-02
>>     2   B1   8.8262e+04 9.0362e+03
>>     3   K    9.1796e+04 4.5790e+03
>>     4   lnq -2.1705e+00 1.4898e-01
>>
>>
>> There was no difference in values amongst the versions. You will note
>> though that these values are slightly different from the ones he
>> supplied for ADMB IDE 450-1. This suggests to me that it is either a
>> 32-bit-64-bit difference or a windows difference.
>>
>> Can anyone else run the attached model for 64-bit on linux and windows
>> or 32-bit on windows for the two versions of ADMB and report the .std
>> file for comparison?
>>
>> Derek
>>
>> On Wed, Oct 5, 2011 at 10:28 AM, dave fournier <davef at otter-rsch.com>
>> wrote:
>> > It is always interesting to see what kind of posts produce the most
>> > response.
>> > certainly none of mine. Anyway
>> > there are a few standard things you can do to narrow this down.
>> > First is to take the output from each model and put it into the other
>> > version and see if the numbers
>> > stay the same. That verifies that the code produces the same function
>> value.
>> > Also
>> > you could reduce the convergence criterion as in -crit 1.e-6 to see if
>> you
>> > can get a little closer to the
>> > actual minimum.
>> >
>> > Although it is not relevant to the discussion your approximation to the
>> > differential equation
>> > for the population dynamics is gross.  See the semi-implicit version in
>> the
>> > original
>> > manual for an idea of how to do it right.
>> > _______________________________________________
>> > Users mailing list
>> > Users at admb-project.org
>> > http://lists.admb-project.org/mailman/listinfo/users
>> >
>>
>> _______________________________________________
>> Users mailing list
>> Users at admb-project.org
>> http://lists.admb-project.org/mailman/listinfo/users
>>
>>
>
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