[FLR-list] size
Ernesto
ernesto.jardim at jrc.ec.europa.eu
Wed May 22 14:55:38 CEST 2013
In fact this is consistent with sampling practices that measure
individuals to the "lowest cm".
Best
EJ
On 05/22/2013 02:54 PM, Ernesto wrote:
> It won't work in several situations and IMO trying to find a solution
> for all doesn't work. We need to find a solution that works and
> implement methods for the others. We may try to be consistent with
> "age" and use [10,11) represented by "10" in the length names.
>
> Best
>
> EJ
>
> On 05/22/2013 02:43 PM, Laurie Kell wrote:
>> but wont work with age slicing which is based on > & <=.
>>
>> Laurie
>>
>>
>> On Wed, May 22, 2013 at 2:41 PM, Ernesto
>> <ernesto.jardim at jrc.ec.europa.eu
>> <mailto:ernesto.jardim at jrc.ec.europa.eu>> wrote:
>>
>> Hi,
>>
>> Yes, that is a problem that we need to sort out. I'm considering
>> using midpoints. It has the advantage of being easy to coerce
>> into numeric. In most cases that's what one needs for
>> computations. Using boundaries will require other(s) operation(s)
>> to get midpoints.
>>
>> Best
>>
>> EJ
>>
>>
>> On 05/22/2013 02:23 PM, Laurie Kell wrote:
>>> There is an issue, boring but may be important to agree on now,
>>> i.e. labeling of length bins.
>>>
>>> What does a length bin mean, i.e. if the "quant" dim represents
>>> length? and the values are 5, 10, ...?
>>>
>>> In the mixdist package these are the righthand boundaries i.e.
>>> they represent (0,5] and (5,10]. But if they are the lefthand
>>> boundaries then they represent (5,10] and (10,INF]. Or they
>>> could be midpoints. One option would be to explicitly label the
>>> bins with the boundaries and then have methods for going
>>> backwards and forwards between parametric and non-parametric
>>> methods. Or to have an attribute that tracks the properties.
>>>
>>> Otherwise I can see a lot of time being wasted in stock
>>> assessments. well more than normal.
>>> Laurie
>>>
>>>
>>> On Wed, May 22, 2013 at 1:07 PM, Ernesto
>>> <ernesto.jardim at jrc.ec.europa.eu
>>> <mailto:ernesto.jardim at jrc.ec.europa.eu>> wrote:
>>>
>>> On 05/22/2013 12:02 PM, Ernesto wrote:
>>>
>>> On 05/22/2013 11:34 AM, Sarah Kraak wrote:
>>>
>>> Hi FLR-guys,
>>>
>>> As you know I am not an active FLR user, but last
>>> year I showed some interest in whether you have
>>> size-based stuff in FLR (see attached email). In the
>>> meanwhile Coilin Minto and myself have been working
>>> on something (also attached - note this is a draft
>>> of the idea; at the moment we are working on the
>>> code to get the final graphs out) which we are
>>> coding in R but which could/should eventually been
>>> done in FLR. Perhaps you are interested.
>>>
>>> Cheers,
>>> Sarah
>>>
>>>
>>> Hi,
>>>
>>> Following Laurie's suggestion I've started a git
>>> repository for length
>>> methods in FLRhttps://github.com/ejardim/FLMethLen
>>> <http://github.com/ejardim/FLMethLen>
>>>
>>> Maybe our first task should be o write down what we're
>>> doing with length
>>> data. Laurie's working on ALKs, so I guess you're
>>> interested in
>>> converting length frequencies to ages for stock
>>> assessment !? We (a4a)
>>> are working on OMs and how to generate them from length
>>> based data so
>>> that uncertainty on the growth model can be included in
>>> the MSE. Sarah
>>> and Colin Minto are working on selectivity. What else ?
>>>
>>> Best
>>>
>>> EJ
>>>
>>> Hi,
>>>
>>> I've updated the readme to reflect the latest messages.
>>>
>>>
>>> EJ
>>>
>>> --
>>> Ernesto Jardim<ernesto.jardim at jrc.ec.europa.eu
>>> <mailto:ernesto.jardim at jrc.ec.europa.eu>>
>>> Fisheries Scientist
>>> FISHREG -- Scientific Support to Fisheries
>>> IPSC Maritime Affairs Unit
>>> EC Joint Research Center
>>> TP 051, Via Enrico Fermi 2749
>>> I-21027 Ispra (VA), Italy
>>> Office : +39 0332 785311 <tel:%2B39%200332%20785311>
>>> Fax: +39 0332 789658 <tel:%2B39%200332%20789658>
>>> https://fishreg.jrc.ec.europa.eu/
>>>
>>>
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>>
>>
>> --
>> Ernesto Jardim<ernesto.jardim at jrc.ec.europa.eu> <mailto:ernesto.jardim at jrc.ec.europa.eu>
>> Fisheries Scientist
>> FISHREG -- Scientific Support to Fisheries
>> IPSC Maritime Affairs Unit
>> EC Joint Research Center
>> TP 051, Via Enrico Fermi 2749
>> I-21027 Ispra (VA), Italy
>> Office :+39 0332 785311 <tel:%2B39%200332%20785311>
>> Fax:+39 0332 789658 <tel:%2B39%200332%20789658>
>> https://fishreg.jrc.ec.europa.eu/
>>
>>
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>>
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>
>
> --
> Ernesto Jardim<ernesto.jardim at jrc.ec.europa.eu>
> Fisheries Scientist
> FISHREG -- Scientific Support to Fisheries
> IPSC Maritime Affairs Unit
> EC Joint Research Center
> TP 051, Via Enrico Fermi 2749
> I-21027 Ispra (VA), Italy
> Office : +39 0332 785311
> Fax: +39 0332 789658
> https://fishreg.jrc.ec.europa.eu/
>
--
Ernesto Jardim<ernesto.jardim at jrc.ec.europa.eu>
Fisheries Scientist
FISHREG -- Scientific Support to Fisheries
IPSC Maritime Affairs Unit
EC Joint Research Center
TP 051, Via Enrico Fermi 2749
I-21027 Ispra (VA), Italy
Office : +39 0332 785311
Fax: +39 0332 789658
https://fishreg.jrc.ec.europa.eu/
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