loadplot {StatDA}R Documentation

Plot the Loadings of a FA

Description

Makes a Reimann-plot of a loadings matrix.

Usage

loadplot(fa.object, titlepl = "Factor Analysis", crit = 0.3, length.varnames = 2)

Arguments

fa.object the output of factor analysis class
titlepl the title of the plot
crit all loadings smaller than crit will be ignored in the plot
length.varnames number of letters for abbreviating the variable names in the plot

Value

Plot of the loadings of a FA therefore a object of factor analysis class must be provided.

Author(s)

Peter Filzmoser <P.Filzmoser@tuwien.ac.at> http://www.statistik.tuwien.ac.at/public/filz/

References

C. Reimann, P. Filzmoser, R.G. Garrett, and R. Dutter: Statistical Data Analysis Explained. Applied Environmental Statistics with R. John Wiley and Sons, Chichester, 2008.

Examples

data(moss)
var=c("Ag","Al","As","B","Ba","Bi","Ca","Cd","Co","Cr","Cu","Fe","Hg","K","Mg","Mn","Mo",
      "Na","Ni","P","Pb","Rb","S","Sb","Si","Sr","Th","Tl","U","V","Zn")
x=log10(moss[,var])

x.mcd=covMcd(x,cor=TRUE)
x.rsc=scale(x,x.mcd$cent,sqrt(diag(x.mcd$cov)))
res5=pfa(x.rsc,factors=2,covmat=x.mcd,scores="regression",rotation="varimax",
    maxit=0,start=rep(0,ncol(x.rsc)))
loadplot(res5,titlepl="Robust FA (log-transformed)", crit=0.3)


[Package StatDA version 1.1 Index]