logcc-class: Class "logcc" for log catch curves
In FLEDA: Exploratory Data Analysis for FLR

Description Creating Objects from the Class Slots Extends Methods Details See Also Examples

This class encapsulates results of a log ratio at age per cohort method.

Objects of this classe should be created with a call to the contructor function logcc(object, ...), where object must be an object of class "FLQuant" and ... can be used to pass trim arguments to the creator funtion.

logcc: Object of class FLCohort.

Class "FLCohort", directly.

Inherits from "FLCohort".

Considering C_{ay}, the catch in numbers at age a=1,…,A per year y=1,…,Y, obtained e.g. from the catch.n slot of a "FLStock", the computation of logr L_{ay} is:

L_{ay}=log{\frac{C_{ay}}{C_{a+1,y+1}}}

FLQuant-class, trim, FLCohort-class

data(ple4sex)
# compute logcc
ple4sex.cc <- logcc(ple4sex@catch.n)
# fine tune plot
ttl <- list(label="Log catch curves by sex for plaice in IV", cex=1)
yttl <- list(label="log ratio", cex=0.8)
xttl <- list(cex=0.8)
stripttl <- list(cex=0.8)
ax <- list(cex=0.7)
# plot
ccplot(data~age|unit, data=ple4sex.cc, type="l", main=ttl, 
       ylab=yttl, xlab=xttl, scales=ax, par.strip.text=stripttl, col=1)