diffograph: Plotting the multiple comparison of means In agricolae: Statistical Procedures for Agricultural Research

 diffograph 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 (Fisher), duncan, Tukey (HSD), Student Newman Keul (SNK), Scheffe, Ryan, Einot and Gabriel and Welsch (REGW), Kruskal Wallis, Friedman and Waerden.

Usage

``````diffograph(x, main=NULL,color1="red",color2="blue",color3="black",
cex.axis=0.8,las=1,pch=20,bty="l",cex=0.8,lwd=1,xlab="",ylab="",...)
``````

Arguments

 `x` Object created by a test of comparison, group=FALSE `main` The main title (on top) `color1` non significant color `color2` significant color `color3` center line color `cex.axis` parameters of the plot() `las` parameters of the plot() `pch` parameters of the plot() `bty` parameters of the plot() `cex` parameters of the plot() `lwd` parameters of the plot() `xlab` parameters of the plot() `ylab` parameters of the plot() `...` Other parameters of the function plot()

Details

The graph.diff function should be used for functions: LSD, duncan, SNK, scheffe, REGW, HSD, kruskal, friedman and waerden test.

Value

 `x` list, object comparison test

Author(s)

Felipe de Mendiburu

References

Multiple comparisons theory and methods. Departament of statistics the Ohio State University. USA, 1996. Jason C. Hsu. Chapman Hall/CRC

`LSD.test`, `HSD.test`, `duncan.test`, `SNK.test`, `scheffe.test`, `REGW.test`, `kruskal`,`friedman`, `waerden.test`

Examples

``````# Example 1
library(agricolae)
data(sweetpotato)
model<-aov(yield~virus,data=sweetpotato)
x<- LSD.test(model,"virus",alpha=0.01,group=FALSE)
diffograph(x,cex.axis=0.8,xlab="Yield",ylab="")
# Example 2
x<- REGW.test(model,"virus",alpha=0.01,group=FALSE)
diffograph(x,cex.axis=0.6,xlab="Yield",ylab="",color1="brown",color2="green")
``````

agricolae documentation built on Oct. 23, 2023, 1:06 a.m.