stability.cv {agrostab}

Coefficient of variation

Description

This function calculates the Francis&Kannenberg's parameters of stability

Usage

stability.cv(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

Returns a data frame:

CV

the genotype's coefficient of variation

Mean

the genotype's mean

References

Francis, T.R. and L.W. Kannenberg. 1978. Yield stability studies in short-season maize. I. A descriptive method for grouping genotypes. Can J Plant Sci 58: 1029?1034. doi: 10.4141/cjps78-157

Examples

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