stability.wricke {agrostab}

R Documentation

Ecovalence

Description

This function calculates the Wricke's ecovalence.

Usage

stability.wricke(dataf, res_var, gen_var, env_var, rep_var,
  plotIt = TRUE)

Arguments

dataf	the name of the data frame containing the data to analyze.
res_var	the response variable.
gen_var	the genotypes variable.
env_var	the environments variable.
rep_var	the replications variable.
plotIt	a logical value specifying if plot should be drawn; default is TRUE

Value

A numeric vector with genotype's ecovalence.

References

Wricke, G., 1962. Tjber eine Methode zur Erfassung der okologischen Streubreite in Feldversuchen. Z. Pflanzenzuchtg. 47: 92-96.

Examples

data(exp_data)
stability.wricke(exp_data,"yield","gen","env","rep")

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