Unix/Linux Go Back    


CentOS 7.0 - man page for string::similarity (centos section 3)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


Similarity(3)		       User Contributed Perl Documentation		    Similarity(3)

NAME
       String::Similarity - calculate the similarity of two strings

SYNOPSIS
	use String::Similarity;

	$similarity = similarity $string1, $string2;
	$similarity = similarity $string1, $string2, $limit;

DESCRIPTION
       $factor = similarity $string1, $string2, [$limit]
	   The "similarity"-function calculates the similarity index of its two arguments.  A
	   value of 0 means that the strings are entirely different. A value of 1 means that the
	   strings are identical. Everything else lies between 0 and 1 and describes the amount
	   of similarity between the strings.

	   It roughly works by looking at the smallest number of edits to change one string into
	   the other.

	   You can add an optional argument $limit (default 0) that gives the minimum similarity
	   the two strings must satisfy. "similarity" stops analyzing the string as soon as the
	   result drops below the given limit, in which case the result will be invalid but lower
	   than the given $limit. You can use this to speed up the common case of searching for
	   the most similar string from a set by specifing the maximum similarity found so far.

SEE ALSO
	The basic algorithm is described in:
	"An O(ND) Difference Algorithm and its Variations", Eugene Myers,
	Algorithmica Vol. 1 No. 2, 1986, pp. 251-266;
	see especially section 4.2, which describes the variation used below.

	The basic algorithm was independently discovered as described in:
	"Algorithms for Approximate String Matching", E. Ukkonen,
	Information and Control Vol. 64, 1985, pp. 100-118.

AUTHOR
	Marc Lehmann <schmorp@schmorp.de>
	http://home.schmorp.de/

	(the underlying fstrcmp function was taken from gnu diffutils and
	modified by Peter Miller <pmiller@agso.gov.au> and Marc Lehmann
	<schmorp@schmorp.de>).

perl v5.16.3				    2008-11-04				    Similarity(3)
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 11:28 PM.