phenability (version 1.0)

nahu: Nassar and Huehn Function

Description

This function performs a stability analysis based on Nassar and Huehn (1987) and, Huehn (1979) statistics. the four nonparametric measures of phenotypic stability are: S1 (mean of the absolute rank differences of a genotype over the n environments), S2 (variance among the ranks over the k environments), S3 (sum of the absolute deviations), and S6 (relative sum of squares of rank for each genotype).

Usage

nahu(data)

Arguments

nahu

nahu function

data

A numeric data.frame with fenotypic means values of MET, and genotypes and environments by rows and columns, respectively.

Value

• Is returned four numerical statistics values (S1, S2, S3, and S6) by genotype.

References

Nassar, R., and M. Huehn. 1987. Studies on estimation of phenotypic stability: Tests of significance for nonparametric measures of phenotypic stability. Biometrics 43:45. Huehn, V.M. 1979. Beitrage zur erfassung der phanotypischen stabilitat. EDV Med. Biol. 10:112.

Examples

require("phenability")
data(bean.data)
bean.data
x <- bean.data

nahu(x)