Multipal normal data set with three clusters generation

Description

To generate multipal normal data set with three clusters

Usage

1
my.normdata.gen(u, p, nobs, nvar)

Arguments

u

The parameters to contral the overlap degree among clusters. The cluster centers are (-u,u),(u,u),(u,-u) respectively. The larger u, the clusters more separated

p

Total number of variables

nobs

Number of observations

nvar

Number of informative variables, nvar takes even value;

Details

To generate a multiple normal dataset with three clusters, the first nvar varialbes are informative, and the remaining p-nvar are non-informative variables. The three clusters are separated when u is large, and overlapped when u is small.

Value

x

Multiple normal dataset generated

y

The true cluster assignment for the generated x dataset