HSD.test {agricolae}R Documentation

Multiple comparisons: Tukey

Description

It makes multiple comparisons of treatments by means of Tukey. The level by alpha default is 0.05.

Usage

HSD.test(y, trt, DFerror, MSerror, alpha = 0.05, group=TRUE, main = NULL)

Arguments

y Variable response
trt Treatments
DFerror Degree free
MSerror Mean Square Error
alpha Significant level
group TRUE or FALSE
main Title

Details

It is necessary first makes a analysis of variance.

Value

y Numeric
trt factor
DFerror Numeric
MSerror Numeric
alpha Numeric
group Logic
main Text

Author(s)

Felipe de Mendiburu

References

Principles and procedures of statistics a biometrical approach Steel & Torry & Dickey. Third Edition 1997

See Also

LSD.test, waller.test

Examples

library(agricolae)
data(sweetpotato)
attach(sweetpotato)
model<-aov(yield~virus)
df<-df.residual(model)
MSerror<-deviance(model)/df
comparison <- HSD.test(yield,virus,df,MSerror, group=TRUE,
main="Yield of sweetpotato. Dealt with different virus")
detach(sweetpotato)

[Package agricolae version 1.0-6 Index]