bar.err {agricolae} R Documentation

## Plotting the standard error or standard deviance of a multiple comparison of means

### Description

It plots bars of the averages of treatments and standard error or standard deviance. It uses the objects generated by a procedure of comparison like LSD, HSD, Kruskal and Waller-Duncan.

### Usage

bar.err(x,variation=c("SE","SD","range","IQR"),horiz=FALSE, bar=TRUE,...)


### Arguments

 x object means of the comparisons the LSD.test, HSD.test,...,etc variation SE=standard error, range=Max-Min or IQR=interquartil range horiz Horizontal or vertical bars bar paint bar ... Parameters of the function barplot()

### Details

x: data frame formed by 5 columns: name of the bars, height, level out: LSD.test, HSD, waller.test, scheffe.test, duncan.test, SNK.test, friedman, kruskal, waerden.test and Median.test.

### Value

A list with numeric vectors giving the coordinates of all the bar midpoints drawn.

 x eje-1 coordinate height eje-2 coordinate by group

### Author(s)

Felipe de Mendiburu

LSD.test, HSD.test, waller.test, kruskal, bar.group

### Examples

library(agricolae)
data(sweetpotato)
model<-aov(yield~virus,data=sweetpotato)
out <- waller.test(model,"virus", console=TRUE,
main="Yield of sweetpotato\ndealt with different virus")
oldpar<-par(mfrow=c(2,2),cex=1)
bar.err(out$means,variation="range",horiz=TRUE,xlim=c(0,45),angle=125,density=6, main="range") bar.err(out$means,variation="SD",ylim=c(0,45),col=colors()[30],
main="Standard deviation",density=8)
bar.err(out$means,variation="SE",horiz=TRUE,xlim=c(0,45),density=8, col="brown",main="Standard error") bar.err(out$means,variation="range",ylim=c(0,45),bar=FALSE,col="green",
main="range")
par(oldpar)
oldpar<-par(mfrow=c(1,2),cex=1)
bar.err(out$means,variation="range",ylim=c(0,45),bar=FALSE,col=0) abline(h=0) # horiz = TRUE bar.err(out$means,variation="SE",horiz=TRUE,xlim=c(0,45),bar=FALSE,col=0)
#startgraph
par(oldpar)
#endgraph


[Package agricolae version 1.3-7 Index]