R: Plotting the multiple comparison of means

plot.group {agricolae} | R Documentation

## Plotting the multiple comparison of means

### Description

It plots bars of the averages of treatments to compare. It uses the objects generated by a procedure of comparison like LSD, HSD, Kruskall, Waller-Duncan, Friedman or Durbin. It can also display the 'average' value over each bar in a bar chart.

### Usage

    ## S3 method for class 'group'
    plot(x,variation=c("range","IQR","SE","SD"), horiz=FALSE,
                         col=NULL,xlim=NULL,ylim=NULL,main=NULL,...)

### Arguments

`x` | Object created by a test of comparison
`variation` | in lines by range, IQR, standard deviation or error
`horiz` | Horizontal or vertical image
`col` | line colors
`xlim` | optional, axis x limits
`ylim` | optional, axis y limits
`main` | optional, main title
`...` | Parameters of the function barplot()

### Details

The output is a vector that indicates the position of the treatments on the coordinate axes.

### Author(s)

Felipe de Mendiburu

### See Also

`BIB.test`, `DAU.test`, `duncan.test`, `durbin.test`, `friedman`, `HSD.test`, `kruskal`, `LSD.test`, `Median.test`, `PBIB.test`, `REGW.test`, `scheffe.test`, `SNK.test`, `waerden.test`, `waller.test`

### Examples

    library(agricolae)
    data(sweetpotato)
    model<-aov(yield~virus,data=sweetpotato)
    comparison<- LSD.test(model,"virus",alpha=0.01,group=TRUE)
    #startgraph
    par(cex=1.5)
    plot(comparison,horiz=TRUE,xlim=c(0,50),las=1)
    title(cex.main=0.8,main="Comparison between\ntreatment means",xlab="Yield",ylab="Virus")
    #endgraph

[Package agricolae version 1.2-8 Index]