English Lexicon

Dimensionality-Reduction

/dɪˌmɛnʃəˈnælɪti rɪˈdʌkʃən/
nounCEFR C1 (Advanced)Top #15000 frequency
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2 senses
As noun
  1. 1

    The process of reducing the number of random variables under consideration by obtaining a set of principal variables.

    "Dimensionality-reduction techniques are essential in preprocessing data for machine learning models."
  2. 2

    A method used in data analysis to simplify complex datasets while retaining their essential features.

    "Principal Component Analysis is a popular dimensionality-reduction method used in exploratory data analysis."

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Linguistic Origin & Historical Etymology

The term 'dimensionality-reduction' is derived from the combination of 'dimension', which comes from the Latin 'dimensio' meaning 'measuring', and 'reduction', from Latin 'reductio', meaning 'to lead back'. The concept emerged in the fields of statistics and machine learning in the late 20th century as a method to simplify data analysis by reducing the number of variables under consideration.

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