exData1                 A simulated data set with 5 true clusters
exData2                 A simulated data set with 4 true clusters
gap                     The gap statistic
part                    Partitioning Algorithm based on Recursive
                        Thresholding
plotColorRange          Plot color scale.
plotColorbarCol         Add a colorbar above a heatmap.
plotColorbarRow         Add a colorbar on the left side of a heatmap.
plotHeatmap             Plot a heatmap
plotTreeCol             Add a column dendrogram to a heatmap.
plotTreeRow             Add a row dendrogram to a heatmap.
