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<div>A '''dendrogram''' is a [[Tree (graph theory)|tree]] diagram frequently used to illustrate the arrangement of the clusters produced by a clustering algorithm (see [[cluster analysis]]). Dendrograms are often used in [[computational biology]] to illustrate the clustering of [[gene]]s.<br />
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Dendron is the Greek word for tree (Greek: tree, tree-like structure; trees).<br />
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For a clustering example, suppose this data is to be clustered using [[euclidean distance]] as the [[Metric (mathematics)|distance metric]].<br />
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[[Image:Clusters.PNG|frame|none|Raw data]]<br />
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The hierarchical clustering dendrogram would be as such:<br />
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[[Image:Hierarchical_clustering_diagram.png|frame|none|Traditional representation]]<br />
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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.<br />
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==See also==<br />
* [[cladogram]]<br />
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[[Category:Trees (structure)]]<br />
[[Category:Machine learning]]<br />
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