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Dimensionality reduction
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Process of reducing the number of random variables under consideration
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Wikipedia

Dimensionality reduction, or dimension reduction, is the transformation of data from a high-dimensional space into a low-dimensional space so that the low-dimensional representation retains some meaningful properties of the original data, ideally close to its intrinsic dimension. Working in high-dimensional spaces can be undesirable for many...

Subclass of
Statistics
Algorithm
Facet of
Machine learning
Data mining
References
Wikidata