August 2018
Intermediate to advanced
522 pages
12h 45m
English
Content preview from Machine Learning Algorithms - Second Edition
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BIRCH
Another online algorithm is Balanced Iterative Reducing and Clustering using Hierarchies (BIRCH). The structure is a little more complex, but it's fundamentally based on a tree structure called the Clustering-Feature Tree (CF-Tree), sometimes also called the Characteristic-Feature Tree. In particular, let's suppose we have a dataset, X:
A CF-Tree at level k is a tuple containing the following:
The first element is the number of samples belonging to the sub-cluster, while the remaining two are the sum of the points and the square sum of ...
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