[FLR-list] [FLR-devel] length

[Iago MOSQUEIRA (JRC)]

For what specific use of length data?


Iago

On 05/14/2013 07:11 PM, Laurie wrote:
> Think it would make sense to have a specific class inherited from FLPar
> for length.
> 
> Laurie
> 
> On 14/05/13 15:05, Iago Mosqueira wrote:
>>
>>
>> On 05/13/2013 05:51 PM, Laurie Kell wrote:
>>> maybe allowing param dim to be named len in FLPar, as is allowed for
>>> quant and age in FLQuant may be all that is needed.
>> Right now the validity only checks that last dim is iter
>>
>> validFLPar <- function(object) {
>>
>>     # Last dimension is called 'iter' ...
>>    if(names(dimnames(object))[length(dim(object))] != "iter")
>>      return("last dimension must be named 'iter'")
>>    # ... and the first 'params'
>>
>>     return(TRUE)
>> }
>>
>> So len will work, let's see which methods fail. But maybe for an
>> specific type of information like this it would make more sense to have
>> a class based on FLPar, with appropriate validity checks and specific
>> methods. You could then dispatch on it any ALK method
>>
>>
>> Iago
>>
>>>
>>> On Mon, May 13, 2013 at 9:09 AM, Laurie <lauriekell at googlemail.com
>>> <mailto:lauriekell at googlemail.com>> wrote:
>>>
>>>      Thanks, I worked with Alberto Murta and José Francisco Loff to
>>>      implement ALKr which is on CRAN. There are some method for
>>>      simulation, e.g. to generate size from length and growth paramters
>>>      and also to simuate ALKs and LFDs, that will be in the next
>>> release.
>>>      I am thinking about how to store ALKs and length data in FLR and
>>> for
>>>      methods to work on them.
>>>
>>>      Laurie
>>>
>>>
>>>
>>>
>>>      On 13/05/13 07:56, Ernesto wrote:
>>>
>>>          HI,
>>>
>>>          I'm about to start looking at it. My idea is to develop a
>>> method to
>>>          convert length to ages using vB (or other) to feed the a4a
>>> stock
>>>          assessment method. Still working on the details but I want
>>> to use vB
>>>          parameters and their uncertainty to introduce uncertainty on
>>> the
>>>          FLStock
>>>          object and run the model for each iteration. Kind of
>>> operating model
>>>          approach.
>>>
>>>          I've done something similar for setting up M. It's all based on
>>>          a new
>>>          FLModelSim class (in dev now).
>>>
>>>          You can take a look at it using the prototype. Source this one
>>>         
>>> https://raw.github.com/__ejardim/a4a/master/packages/__FLa4a/R/FLSimpleModel-class.R
>>>
>>>         
>>> <https://raw.github.com/ejardim/a4a/master/packages/FLa4a/R/FLSimpleModel-class.R>
>>>
>>>          and the new M class for a4a is here
>>>         
>>> https://raw.github.com/__ejardim/a4a/master/packages/__FLa4a/R/a4aM-class.R
>>>
>>>         
>>> <https://raw.github.com/ejardim/a4a/master/packages/FLa4a/R/a4aM-class.R>
>>>
>>>          , there's some examples.
>>>
>>>          Best
>>>
>>>          EJ
>>>
>>>          On 05/10/2013 11:09 AM, Laurie wrote:
>>>
>>>              Hi
>>>
>>>              I am working on length and age data as part of linking the
>>>              ALKr package
>>>              and FLR.
>>>
>>>              I was going to propose to use FLPar to add the length dim.
>>>
>>>              Has anybody done anything with length, i.e. methods, data
>>>              classes etc....
>>>
>>>              Laurie
>>>
>>>             
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-- 
Dr Iago Mosqueira

European Commission – Joint Research Center
Institute for the Protection and Security of the Citizen (IPSC)
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