Special Kinds of Trees
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There are 3 special kinds of trees:
Dendrograms
Decision Trees
Flowcharts
These are binary trees (i.e. each node has at most 2 children).
They are usually used to represent the results of a data mining technique called hierarchical clustering (an algorithm that organizes objects into a hierarchical structure based on a certain similarity metric).
The height of the line that connects nodes in a dendrogram represents the distance between the corresponding objects.
This is a versatile technique and can be used whenever a similarity/distance metric is available. They are commonly used in phylogenetic trees, using genetic distance as a metric.
Every node represents a decision between 2 or more options.
Decision Trees can be built automatically from labeled data.
Flowcharts can be used to visualize a process or decision flows.
