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On the appropriateness of Platt scaling in classifier calibration by Björn Böken is a Computer Science article available to read on EtoBox.

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Many applications using data mining and machine learning techniques require posterior probability estimates besides often highly accurate predictions. Classifier calibration is a separate branch of machine learning that aims at transforming classifier predictions into posterior class probabilities and thus are useful additional extensions in the respective applications. Among the existing state-of-the-art classifier calibration techniques, Platt scaling (sometimes also called sigmoid or logistic calibration) actually is the only parametric one while almost all of its competing methods do not rely on parametric assumptions. Platt scaling is controversially discussed in the classifier calibration literature, despite good empirical results reported in many domains there are many authors criticizing it. Interestingly, none of these criticisms properly deal with the underlying parametric assumptions. Instead, even incorrect statements exist. Thus, the first contribution of this work is to review such criticism and to present a proof of the true parametric assumptions. In fact, these are more general and valid for different probability distributions, which is an immediate consequence. Ne

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Author

Björn Böken

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Computer Science (Physical Sciences)