[ADMB Users] How to use vector elements in PARAMETER_SECTION

[Steve Teo - NOAA Federal]

Thanks Jim.  That's exactly what I needed.  It was great chatting with you
too.

Just trying to get a toy model for blue shark going and learn ADMB at the
same time.

Steve


On Tue, Apr 2, 2013 at 5:16 PM, Jim Ianelli - NOAA Federal <
jim.ianelli at noaa.gov> wrote:

> hi!
>
> Great to see you the other week!
>
> Not such a beginner issue!
>
> Well it might seem like it should be obvious but without going into too
> much detail, ADMB parameter bounds (which I try to avoid whenever possible)
> are set up a little differently.  Short answer, I don't know how to do
> exactly what you want (others may know).
>
> On the other hand, perhaps if you think about it from a vector of
> parameters, x dimensioned 1 to np things can become efficient for you.
>
> In the data section you can read in vectors of lower bounds (lb_x) and
> upper bounds (ub_x) and even an ivector of phases from which you wish to
> turn each element on (phase_x). Then the code below sets any number of
> parameters with the same number of ADMB lines (I think 3 total, 4 with
> phases vector)
>
> PARAMETER_SECTION
>  ...
>  init_bounded_number_vector   x(1,np,1,lb_x,ub_x,phase_x)
>
> So this becomes economical perhaps in a different way than what you are
> thinking.
>
> Cheers,
> Jim
>
>
>
> On Tue, Apr 2, 2013 at 4:40 PM, Steve Teo - NOAA Federal <
> steve.teo at noaa.gov> wrote:
>
>> Steve,
>>
>> That's not it.  I am not trying to declare the dimensions of a vector.  I
>> am just trying to set up the bounds of a bounded parameter in the
>> PARM_SECTION.  I know that if I declare a double first and then use that
>> double in the PARM_SECTION to set bounds, it works.  But that is ugly
>> coding (6 lines and 3 variable names extra per parm).  So I am wondering if
>> there is an elegant way of calling an element in the vector directly when
>> setting up the bounds and phases.  If there is not, that's fine - just
>> wanted to know. Thanks.
>>
>> Steve
>>
>>
>>
>>
>> On Tue, Apr 2, 2013 at 4:14 PM, Martell, Steven <
>> s.martell at fisheries.ubc.ca> wrote:
>>
>>> You need to use vectors to declare the dimensions of a vector. your
>>> trying to use double precision numbers to delcare the dimensions:
>>>
>>> try:
>>>
>>> DATA_SECTION
>>>         init_ivector x_input(1,2)
>>>         int x_lb
>>>
>>>         !! x_lb=x_input(1);
>>>
>>> PARA
>>>         init_bounded_number x(x_input(1),x_input(2))..
>>>
>>> S
>>> On 2013-04-02, at 3:08 PM, Steve Teo - NOAA Federal <steve.teo at noaa.gov>
>>>  wrote:
>>>
>>> > Hi,
>>> >
>>> > Beginner with ADMB here.  I am trying to read in a vector, which I
>>> then use to set up the bounds in my parameter section.  The code runs if I
>>> initialize the elements as numbers before I use them.  But it chokes if I
>>> directly reference the vector element.  See below for example code.
>>> >
>>> > Is there an elegant way of doing this without having to initialize
>>> lots of numbers just to set up the bounds?
>>> >
>>> > DATA_SECTION
>>> >   init_vector x_input(1,2)
>>> >
>>> >   number x_lb
>>> >   number x_ub
>>> >   !!x_lb = x_input[1];
>>> >   !!x_ub = x_input[2];
>>> >
>>> > PARAMETER_SECTION
>>> >   init_bounded_number x(x_lb,x_ub) // works
>>> >   init_bounded_number x(x_input[1], x_input[2]) // does NOT work
>>> >
>>> > Thanks.
>>> >
>>> > Steve
>>> > _______________________________________________
>>> > Users mailing list
>>> > Users at admb-project.org
>>> > http://lists.admb-project.org/mailman/listinfo/users
>>>
>>>
>>
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>>
>
>
> --
>
> James Ianelli
> NMFS/NOAA Building 4
> 7600 Sand Pt Way NE
> Seattle WA 98115
>
>  206 526 6510
>
>
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