Using Hard Classifiers to Estimate Conditional Class Probabilities

  • Authors:
  • Ole Martin Halck

  • Affiliations:
  • -

  • Venue:
  • ECML '02 Proceedings of the 13th European Conference on Machine Learning
  • Year:
  • 2002

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Abstract

In many classification problems, it is desirable to have estimates of conditional class probabilities rather than just "hard" class predictions. Many algorithms specifically designed for this purpose exist; here, we present a way in which hard classification algorithms may be applied to this problem without modification. The main idea is that by stochastically changing the class labels in the training data in a simple way, a classification algorithm may be used for estimating any contour of the conditional class probability function. The method has been tested on a toy problem and a problem with real-world data; both experiments yielded encouraging results.