make.S: Define Dimensional Anchors around the Unit Circle

In Radviz: Project Multidimensional Data in 2D Space

Define Dimensional Anchors around the Unit Circle

Description

make.S will return [x,y] coordinates for n dimensional anchors equally spaced around the unit circle

Usage

make.S(x)

Arguments

x	a vector of dimensional anchors, or a list of dimensional anchors for Class Discrimination Layout, or the number of anchors to put on the circle

Details

If x is a vector or a list, values will be used to set the row names of the matrix.

Value

A matrix with 2 columns (x and y coordinates of dimensional anchors) and 1 line per dimensional anchor (so called springs). If x is a vector, the row names of the matrix will be set to the syntactically correct version of values in the vector (through a call to make.names). Please note that some functions expect to match column names of data to row names of the spring matrix.

Author(s)

Yann Abraham

Examples

data(iris)
das <- c('Sepal.Length','Sepal.Width','Petal.Length','Petal.Width')
make.S(length(das)) # without row names
make.S(das) # with row names
make.S(list(c('Sepal.Length','Sepal.Width'),c('Petal.Length','Petal.Width')))

Radviz documentation built on March 26, 2022, 1:10 a.m.