Fast parameterized matching with q-grams

  • Authors:
  • Leena Salmela;Jorma Tarhio

  • Affiliations:
  • Department of Computer Science and Engineering, Helsinki University of Technology, Finland;Department of Computer Science and Engineering, Helsinki University of Technology, Finland

  • Venue:
  • Journal of Discrete Algorithms
  • Year:
  • 2008

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Abstract

Two strings parameterize match if there is a bijection defined on the alphabet that transforms the first string character by character into the second string. The problem of finding all parameterized matches of a pattern in a text has been studied in both one and two dimensions but the research has been centered on developing algorithms with good worst-case performance. We present algorithms that solve this problem in sublinear time on average for moderately repetitive patterns.