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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Order-Preserving Matching with Filtration
verfasst von : Tamanna Chhabra, Jorma Tarhio
Erschienen in: Experimental Algorithms
Verlag: Springer International Publishing
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The problem of order-preserving matching has gained attention lately. The text and the pattern consist of numbers. The task is to find all substrings in the text which have the same relative order as the pattern. The problem has applications in analysis of time series like stock market or weather data. Solutions based on the KMP and BMH algorithms have been presented earlier. We present a new sublinear solution based on filtration. Any algorithm for exact string matching can be used as a filtering method. If the filtration algorithm is sublinear, the total method is sublinear on average. We show by practical experiments that the new solution is more efficient than earlier algorithms.