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More Than Two Classes

  • Any-of or multivalue classification

    • Classes are independent of each other.

    • A document can belong to 0, 1, or >1 classes.

    • Decompose into n binary problems

    • Quite common for documents

  • One-of or multinomial or polytomous classification

    • Classes are mutually exclusive.

    • Each document belongs to exactly one class

    • E.g., digit recognition is polytomous classification

      • Digits are mutually exclusive

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