[FLR-list] Fwd: [FLR-devel] Leslie matrices

[Laurie]

There is a new method leslie in FLAdvice that generates a leslie matrix 
based on an FLBRP object e.g,

library(FLAdvice)
library(popbio)

data(ple4)

lmPle4=leslie(FLBRP(ple4))

You can use the popbio package to do all kinds of useful stuff e.g.

# growth rate
log(lambda(lmPle4) )

Laurie



On 03/28/2012 11:27 AM, Iago Mosqueira wrote:
> ---------- Forwarded message ----------
> From: Laurie<lauriekell at googlemail.com>
> Date: 28 March 2012 11:05
> Subject: [FLR-devel] Leslie matrices
> To: flr-devel at lists.sourceforge.net
>
>
> In FLR there is code to calculate r from Leslie Matrices. There is
> also the package popbio based on Caswells book, which has many
> examples and methods.
>
> I propose to create a method to generate Leslie Matrices from FLStock
> and FLBiol objects then we can easily use popbio with FLR.
>
> I dont thnk we need new classes just a method like
>
> leslie(ple4)
>
> There are problems about averaging over periods etc., as with stf&
> FLBRP. But if the leslie method works on a n FLBRP object then we dont
> have to worry about reimplementation etc.
>
> i.e. for FLStock the method will call
>
> leslie(FLBRP(ple4))
>
> Once we have the leslie matrix then we can do many analyses and even
> make stock projections,
>
> Laurie
>
>
>
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