fit.measures {biplotEZ}

Compute measures of fit for the biplot.

Description

This function computes the measures of fit for the biplot. The biplot object is augmented with additional items, which can differ depending on the type of biplot. The measures provide information on the overall quality of fit and the adequacy of representation of variables.

Usage

fit.measures(bp)

Arguments

bp

an object of class biplot.

Value

An object of class biplot. The object is augmented with additional items, depending on the type of biplot object.

quality

the overall quality of fit.

adequacy

the adequacy of representation of variables.

For an object of class PCA:

axis.predictivity

the fit measure of each individual axis.

sample.predictivity

the fit measure for each individual sample.

For an object of class CVA:

axis.predictivity

the fit measure of each individual axis.

class.predictivity

the fit measure for each class mean.

within.class.axis.predictivity

the fit measure for each axis based on values expressed as deviations from their class means.

within.class.sample.predictivity

the fit measure for each sample expressed as deviation from its class mean.

Examples

out <- biplot (iris[,1:4]) |> PCA() |> fit.measures()
summary(out)