as.hclust                Convert Objects to Class hclust
biplot                   Biplot of Multivariate Data
biplot.princomp          Biplot for Principal Components
cancor                   Canonical Correlations
cmdscale                 Classical (Metric) Multidimensional Scaling
cutree                   Cut a tree into groups of data
dist                     Distance Matrix Computation
factanal                 Factor Analysis
hclust                   Hierarchical Clustering
identify.hclust          Identify Clusters in a Dendrogram
kmeans                   K-Means Clustering
prcomp                   Principal Components Analysis
princomp                 Principal Components Analysis
rect.hclust              Draw Rectangles Around Hierarchical Clusters
varimax                  Rotation Methods for Factor Analysis

Example datasets for factor analysis:
Harman23.cor             Harman Example 2.3
Harman74.cor             Harman Example 7.4
ability.cov              Ability and Intelligence Tests