[ADMB Users] diagnostics to help (especially new) users

dave fournier davef at otter-rsch.com
Sun Feb 17 13:15:00 PST 2013

On 13-02-17 12:58 PM, John Sibert wrote:

In the meantime one could add  a bit of code
to the derivative checker so that
it evaluates the function twice with the same values and checks to see 
if the objective
function is the same.  That would be easy.  you would still have to find the
uninitialized variable by inspection.

This seems like a reasonable idea to me, but I doubt the code will write 
> John
> John Sibert
> Emeritus Researcher, SOEST
> University of Hawaii at Manoa
> Honolulu HI (GMT-10)
> 808-294-3842
> Visit the ADMB project http://admb-project.org/
> On 02/13/2013 04:39 PM, dave fournier wrote:
>> I am working with a guy who has tried to produce a fairly complex model
>> without understanding much about how ADMB works. One of the problems 
>> that
>> newbies have is the nature of properly initializing variables.
>> It should be easy to have a
>>    ./xxx   -init
>> to verify that parameters are properly initialized.  It would just 
>> have to
>> evaluate the userfunction twice with the same initial parameter 
>> values and
>> check the values of the model parameters to see where they differ.
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