FactoClass (version 0.7.7)

kmeansW: K-means with Weights of the Elements

Description

It is a modification of kmeans Hartigan-Wong algorithm to consider the weight of the elements to classify.

Usage

kmeansW(x, centers, weight = rep(1/nrow(x),nrow(x)),
        iter.max = 10, nstart = 1)

Arguments

x

A numeric vector, matrix or data frame.

centers

Either the number of clusters or a set of initial (distinct) cluster centres. If a number, a random set of (distinct) rows in x is chosen as the initial centres.

weight

weight of the elements of x. by default the same.

iter.max

The maximum number of iterations allowed.

nstart

If centers is a number, how many random sets should be chosen?

Value

• object of class FactoClass.tex with the following characteristics:
• cluster
  vector indicating the cluster of each element.
• ...

Details

With the 'Hartigan-Wong' algorithm, this function performs the K-means clustering diminishing inertia intra classes.

Examples

data(Bogota)
 ac.bog <- Bogota[-1]
 il.bog <- Bogota[ 1]
 
 acs <- dudi.coa( ac.bog, nf=6 , scannf = FALSE )
 
 kmeansW( acs$li, 7, acs$lw )