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Edit distance

  • Given two strings S1 and S2, the minimum number of operations to convert one to the other

  • Operations are typically character-level

    • Insert, Delete, Replace, (Transposition)

  • E.g., the edit distance from dof to dog is 1

    • From cat to act is 2 (Just 1 with transpose.)

    • from cat to dog is 3.

  • Generally found by dynamic programming.

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