Dendrogram Plots

I recently attended the Wolfram Seminar, “Statistics and Data Analysis with Mathematica“.  The discussion on Hierarchical Clustering was especially interesting to me.  They showed a dendrogram plot for some sample text data.

A dendrogram is defined here as:

A dendrogram (from Greek dendron “tree”, -gramma “drawing”) is a tree diagram frequently used to illustrate the arrangement of the clusters produced by hierarchical clustering.

And, here is the Mathematica example:

Needs["HierarchicalClustering`"]

textdata =
StringSplit[
"This seminar will give a broad overview of statistics in \
Mathematica. Statistics functions and other technologies, such as \
import/export capabilities and visualization functions, as they \
relate to statistical computation will be discussed."];

Show[DendrogramPlot[textdata, LeafLabels -> (# &),
Orientation -> Left], ImageSize -> Large]

And, here is the result: