biplot.AMMI: Biplots for AMMI and GGE analyses of multi-environment...

In OnofriAndreaPG/aomisc: Statistical methods for the agricultural sciences

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

data("WinterWheat")
tab <- with(WinterWheat, AMMI(Yield, Genotype, Year, Block, PC = 2))
biplot(tab)

OnofriAndreaPG/aomisc documentation built on Feb. 26, 2024, 8:21 p.m.