| Function | Description |
| hc2Newick | Convert hclust objects to Newick format files |
| r2cluster | Write to Cluster file format |
| r2gtr | Write to gtr, atr, cdt file format |
| r2xcluster | Write to Xcluster file format |
| read.eisen | Read expression data from a file formatted for Eisen clustering |
| xcluster | Hierarchical clustering |
| xcluster2r | Importing Xcluster/Cluster output |