[FLR-list] [FLR-devel] length

[Iago Mosqueira]

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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