clusterClickstreams {clickstream}

Performs K-Means Clustering on a List of Clickstreams

Description

Performs k-means clustering on a list of clickstreams. For each clickstream a transition matrix of a given order is computed. These transition matrices are used as input for performing k-means clustering.

Usage

clusterClickstreams(clickstreamList, order = 0, centers, ...)

Arguments

clickstreamList

A list of clickstreams for which the cluster analysis is performed.

order

The order of the transition matrices used as input for clustering (default is 0; 0 and 1 are possible).

centers

The number of clusters.

...

Additional parameters for k-means clustering (see kmeans).

Value

This method returns a ClickstreamClusters object (S3-class). It is a list with the following components:

clusters

The resulting list of Clickstreams objects.

centers

A matrix of cluster centres.

states

Vector of states

totss

The total sum of squares.

withinss

Vector of within-cluster sum of squares, one component per cluster.

tot.withinss

Total within-cluster sum of squares, i.e., sum(withinss).

betweenss

The between-cluster sum of squares, i.e., totss - tot.withinss.

Author(s)

Michael Scholz [e-mail]

See Also

print.ClickstreamClusters, summary.ClickstreamClusters

Examples

clickstreams <- c("User1,h,c,c,p,c,h,c,p,p,c,p,p,o",
               "User2,i,c,i,c,c,c,d",
               "User3,h,i,c,i,c,p,c,c,p,c,c,i,d",
               "User4,c,c,p,c,d",
               "User5,h,c,c,p,p,c,p,p,p,i,p,o",
               "User6,i,h,c,c,p,p,c,p,c,d")
cls <- as.clickstreams(clickstreams, header = TRUE)
clusters <- clusterClickstreams(cls, order = 0, centers = 2)
print(clusters)