R: Transform a Vector into a Double-Coded Matrix

vec2ddc {svs}

R Documentation

Transform a Vector into a Double-Coded Matrix

Description

A helper function for transforming a vector into a double-coded matrix.

Usage

vec2ddc(x, limits = c(NA, NA))

vec2dc(x, limits = c(NA, NA))

Arguments

`x`	A vector, either numeric or an ordered factor.
`limits`	Numeric vector of length two specifying the limits (or "poles") of the underlying ordinal variable. If left unspecified (the default), then the minimum and maximum in `x` will be taken.

Details

Double coding, also called data doubling, is a way of indicating how the values of an ordinal variable relate to the lower and upper limits of the variable. Columns - and + express how close each (observed) value is to these respective limits.

Value

A matrix with column names - and +.

References

Greenacre, M. (2014) Data doubling and fuzzy coding. In: J. Blasius and M. Greenacre (eds.) Visualization and verbalization of data. Chapman and Hall/CRC, 239–253. Greenacre, M. (2017) Correspondence analysis in practice, Third edition. Boca Raton: Chapman and Hall/CRC, 201–208.