42 lines
1.4 KiB
Factor
42 lines
1.4 KiB
Factor
! Copyright (C) 2021 Bubbler.
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! See http://factorcode.org/license.txt for BSD license.
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USING: help.markup help.syntax kernel math sequences strings ;
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IN: rosalind.cat
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HELP: (noncrossing-matches)
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{ $values
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{ "seq" sequence }
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{ "n" integer }
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}
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{ $description "Handles the recursive case of " { $snippet "noncrossing-matches" } ". Extracts the first item of the sequence, splits the rest at the opposite base, and calculates the sum of products of non-crossing matches of each half." } ;
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HELP: cat
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{ $values
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{ "str" string }
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{ "n" integer }
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}
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{ $description "Solves the problem CAT on Rosalind: Given an RNA string, count non-crossing perfect matchings of base pairs modulo 1000000." } ;
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HELP: cat-main
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{ $description "Solves the problem CAT on Rosalind, using a real dataset." } ;
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HELP: noncrossing-matches
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{ $values
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{ "seq" sequence }
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{ "n" integer }
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}
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{ $description "The main memoized routine for counting the non-crossing perfect matchings. The expected elements are one of 1, i, -1, or -i, so that each base pair sums to 0." } ;
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HELP: unbalanced?
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{ $values
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{ "seq" sequence }
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{ "?" boolean }
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}
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{ $description "Tests if the given string is unbalanced, which means that the number of perfect matchings (and therefore the number of non-crossing perfect matchings) is zero." } ;
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ARTICLE: "rosalind.cat" "rosalind.cat"
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{ $vocab-link "rosalind.cat" }
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;
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ABOUT: "rosalind.cat"
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