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. Dendrograms are often used in computational biology to illustrate the clustering of genes or samples.

For a clustering example, suppose this data is to be clustered using Euclidean distance as the distance metric.

Raw data

The hierarchical clustering dendrogram would be as such:

Traditional representation

Here the top row of nodes represent data, and the remaining nodes represent the clusters to which the data belong, and the arrows represent the distance.

See also

  • Cladogram
  • Hierarchical clustering
  • MEGA, a free software for drawing dendrograms.
  • yEd, a free software for drawing and automatically arranging dendrograms.