| spay-class {FLEDA} | R Documentation |
This class encapsulates results of a spay method.
Objects of this classe should be created with a call to the contructor function spay(object, ...), where object must be an object of class "FLQuant" and ... can be used to pass trim arguments to the creator funtion.
"FLQuant".
Class "FLQuant", directly.
Inherits from "FLQuant".
signature(x="formula", data="spay"): provides the bubbles plot with different colors for positive and negative values.
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" object, the computation of spay P_{ay}^s is:
Consider:
P_{ay}=frac{C_{ay}}{sum_a{C_{ay}}}
and
s_a = sqrt{frac{sum{(P_{ay}-bar{P}_a)^2}}{Y-1}}
P_{ay}^s=frac{P_{ay}-bar{P}_a}{s_a}
FLQuant-class, trim, pay-class
data(ple4sex)
# compute standardized catch proportion at age
ple4sex.spay <- spay(ple4sex@catch.n)
# fine tune
ttl <- list(label="Standardized catch proportion at age for Plaice in IV", cex=1)
yttl <- list(label="age", cex=0.8)
xttl <- list(cex=0.8)
ax <- list(cex=0.7)
# plot
bubbles(age~year|unit, ple4sex.spay, main=ttl,
ylab=yttl, xlab=xttl, scales=ax)