Concept

Multi-label classification

Résumé
In machine learning, multi-label classification or multi-output classification is a variant of the classification problem where multiple nonexclusive labels may be assigned to each instance. Multi-label classification is a generalization of multiclass classification, which is the single-label problem of categorizing instances into precisely one of several (more than two) classes. In the multi-label problem the labels are nonexclusive and there is no constraint on how many of the classes the instance can be assigned to. Formally, multi-label classification is the problem of finding a model that maps inputs x to binary vectors y; that is, it assigns a value of 0 or 1 for each element (label) in y. Problem transformation methods Several problem transformation methods exist for multi-label classification, and can be roughly broken down into:
  • Transformation into binary classification problems: the baseline approach, called the binary relevance method, amounts to independentl
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