R: Multiple comparisons. The van der Waerden (Normal Scores)

waerden.test {agricolae}

R Documentation

Multiple comparisons. The van der Waerden (Normal Scores)

Description

A nonparametric test for several independent samples.

Usage

waerden.test(y, trt, alpha=0.05, group=TRUE, main=NULL,console=FALSE)

Arguments

`y`	Variable response
`trt`	Treatments
`alpha`	Significant level
`group`	TRUE or FALSE
`main`	Title
`console`	logical, print output

Details

The data consist of k samples of posibly unequal sample size.
The post hoc test is using the criterium Fisher's least
significant difference (LSD).

Value

`y`	Numeric
`trt`	factor
`alpha`	Numeric
`group`	Logic
`main`	text

Author(s)

Felipe de Mendiburu

References

Practical Nonparametrics Statistics. W.J. Conover, 1999

Examples

library(agricolae)
# example 1
data(corn)
comparison<-with(corn,waerden.test(observation,method,group=TRUE))
comparison<-with(corn,waerden.test(observation,method,group=FALSE))
# example 2
data(sweetpotato)
comparison<-with(sweetpotato,waerden.test(yield,virus,alpha=0.01,group=TRUE))

[Package agricolae version 1.2-6 Index]