Sequence Data Mining by Guozhu Dong PhD, Jian Pei PhD (auth.)

By Guozhu Dong PhD, Jian Pei PhD (auth.)

Understanding series facts, and the facility to make use of this hidden wisdom, creates an important influence on many points of our society. Examples of series information comprise DNA, protein, consumer buy heritage, internet browsing historical past, and more.

Sequence facts Mining presents balanced insurance of the prevailing effects on series info mining, in addition to development varieties and linked trend mining tools. whereas there are numerous books on information mining and series information research, presently there are not any books that stability either one of those themes. This expert quantity fills within the hole, permitting readers to entry cutting-edge ends up in one place.

Sequence information Mining is designed for pros operating in bioinformatics, genomics, net companies, and fiscal facts research. This ebook can also be compatible for advanced-level scholars in machine technology and bioengineering.

Forward through Professor Jiawei Han, college of Illinois at Urbana-Champaign.

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Sample text

36 2 Frequent and Closed Sequence Patterns Then the set of patterns with prefix a can be further divided into five subsets without overlap: (1) pattern a itself; (2) those with prefix (ab); (3) those with prefix ab; (4) those with prefix ac; and (5) those with prefix ad. With the existence of constraint C, pattern a fails C and thus is discarded; and (ab) is illegal with respect to constraint C, so the second subset of patterns is pruned. The remaining subsets of patterns should be explored one by one.

Sequences a, aa, a(ab) and a(abc) are prefixes of s, but neither ab nor a(bc) is a prefix. 6 (Suffix). Consider a sequence α = e1 e2 · · · en , where each ei (1 i n) is an element. Let β = e1 e2 · · · em−1 em (m n) be a subsequence of α. Sequence γ = el el+1 · · · en is the suffix of α with respect to prefix β, denoted as γ = α/β, if 1. l = im such that there exist 1 i1 < · · · < im n such that ej ⊆ eij (1 j m), and im is minimized. el is the shortest prefix of α which contains e1 e2 · · · em−1 em as a subsequence; and 2.

Infrequent items, such as f , are removed. Also, in the same scan, the sequences that contain no subsequence satisfying the constraint, such as the first sequence, a(bc)e, should be removed. 2. Divide the set of sequential patterns into subsets without overlap. Without considering constraint C, the complete set of sequential patterns should be divided into five subsets without overlap according to the set of length1 sequential patterns: (1) those with prefix a; (2) those with prefix b; . . ; and (5) those with prefix e.

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