kohonen (version 2.0.19)

classvec2classmat: Convert a classification vector into a matrix or the other way around.

Description

Functions toggle between a matrix representation, where class membership is indicated with one '1' and for the rest zeros at each row, and an class vector (maybe integers or class names). The classification matrix contains one column per class. Conversion from a class matrix to a class vector assigns each row to the column with the highest value. An optional argument can be used to assign only those objects that have a probability higher than a certain threshold (default is 0).

Usage

classvec2classmat(yvec)
classmat2classvec(ymat, threshold=0)

Arguments

yvec

class vector. Usually integer values, but other types are also allowed.

ymat

class matrix: every column corresponds to a class.

threshold

only classify into a class if the probability is larger than this threshold.

Value

classvec2classmat returns the classification matrix, where each column consists of zeros and ones; classmat2classvec returns a class vector (integers).

See Also

bdk, xyf

Examples

classes <- c(rep(1, 5), rep(2, 7), rep(3, 9))
classmat <- classvec2classmat(classes)
classmat
classmat2classvec(classmat)