Fraction: Selection of a fraction of the data

In MultBiplotR: Multivariate Analysis Using Biplots in R

Selection of a fraction of the data

Description

Selects a percentage of the data eliminating the observations with higher Mahalanobis distances to the center.

Usage

Fraction(data, confidence = 1)

Arguments

data	Two dimensional data set
confidence	Percentage to retain. (0-1)

Details

The function is used to select a fraction of the data to be plotted for example when clusters are used. The function eliminates the extreme values.

Value

An object of class fraction with the following fields

data	The originaldata
fraction	The selected data
confidence	The percentage selected

Author(s)

Jose Luis Vicente Villardon

References

Meulman, J. J., & Heiser, W. J. (1983). The display of bootstrap solutions in multidimensional scaling. Murray Hill, NJ: Bell Laboratories.

Linting, M., Meulman, J. J., Groenen, P. J., & Van der Kooij, A. J. (2007). Stability of nonlinear principal components analysis: An empirical study using the balanced bootstrap. Psychological Methods, 12(3), 359.

See Also

ConcEllipse, AddCluster2Biplot

Examples

a=matrix(runif(50), 25,2)
a2=Fraction(a, 0.7)

MultBiplotR documentation built on Nov. 21, 2023, 5:08 p.m.