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Weighted edit distance

  • As above, but the weight of an operation depends on the character(s) involved

    • Meant to capture OCR or keyboard errors
      Example: m more likely to be mis-typed as n than as q

    • Therefore, replacing m by n is a smaller edit distance than by q

    • This may be formulated as a probability model

  • Requires weight matrix as input

  • Modify dynamic programming to handle weights

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