biplot.AMMIobj {statforbiology} | R Documentation |
Biplots for AMMI and GGE analyses of multi-environment genotype experiments
Description
This method is reserved for the classes 'AMMIobject' and 'GGEobject' as obtained from the 'AMMI()' and 'GGE()' functions in the 'aomisc' package. It draws swift biplots of two types: type 1 plots PC1 against the average yield of genotypes across environments, while type 2 plots PC2 against PC1. The former type of biplot is reserved for 'AMMI' objects, while the second one is for AMMI and GGE objects.
Usage
## S3 method for class 'AMMIobject'
biplot(x, biplot = 1, xlim=NULL, ylim=NULL, elabels=NULL,
glabels=NULL, quad=FALSE, cexG=0.9,
cexE=0.9,
xlab=NULL, ylab=NULL, font=1, ...)
## S3 method for class 'GGEobject'
biplot(x, biplot = 1, xlim=NULL, ylim=NULL, elabels=NULL,
glabels=NULL, quad=FALSE, cexG=0.9,
cexE=0.9,
xlab=NULL, ylab=NULL, font=1, ...)
Arguments
x |
a 'AMMIobject' or 'GGEobject' objects |
biplot |
Numeric: either 1 or 2, to request on of the two available types of biplots (see description). |
xlim |
graphical parameter as in the 'plot' method |
ylim |
graphical parameter as in the 'plot' method |
elabels |
labels for the environments |
glabels |
labels for the genotypes |
quad |
logical. If TRUE, plots the axes |
cexG |
graphical parameter: the 'cex' for the genotype labels |
cexE |
graphical parameter: the 'cex' for the environment labels |
xlab |
graphical parameter as in the 'plot' method |
ylab |
graphical parameter as in the 'plot' method |
font |
graphical parameter as in the 'plot' method. Relating to the genotype labels |
... |
Other additional arguments |
Value
It only returns a graph
Author(s)
Andrea Onofri
Examples
WinterWheat <- getAgroData("WinterWheat")
tab <- with(WinterWheat, AMMI(Yield, Genotype, Year, Block, PC = 2))
biplot(tab)