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1. The Collaborative International Dictionary of English v.0.48 |
Pattern matching \Pat"tern match"ing\, n. [See pattern.]
(Computers)
A technique in automated data analysis, usually performed on
a computer, by which a group of characteristic properties of
an unknown object is compared with the comparable groups of
characteristics of a set of known objects, to discover the
idenity or proper classification of the unknown object.
Note: There are two major types of pattern matching,
statistical pattern matching and syntactic pattern
matching. In statistical pattern matching, the
criteria used to recognize identity or class membership
vary, but in general some combination of the
differences in the groups of characteristics of known
and unknown objects are considered to be a measure of
the difference ("distance") between them, and the
closest known object or objects are viewed as
presenting the most likely identity or class for the
unknown object. In syntactic pattern matching, a set of
known patterns, e.g. as in the possible order of parts
of speech in a language, is defined, and the unknown
pattern is compared to find that known pattern or
patterns which matches the unknown exactly. In general,
statistical pattern matching is used where properties
of objects with continuous values are being compared,
and syntactic pattern matching where a complex
arrangement of at least two different objects may be
built by application of a set of rules (a "grammar")
for combining the objects in a specified order.
Examples of the latter are natural and formal
languages.
[PJC]
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2. The Free On-line Dictionary of Computing (30 December 2018) |
pattern matching
1. A function is defined to take arguments of a particular
type, form or value. When applying the function to its actual
arguments it is necessary to match the type, form or value of
the actual arguments against the formal arguments in some
definition. For example, the function
length [] = 0
length (x:xs) = 1 + length xs
uses pattern matching in its argument to distinguish a null
list from a non-null one.
There are well known algorithm for translating pattern
matching into conditional expressions such as "if" or "case".
E.g. the above function could be transformed to
length l = case l of
[] -> 0
x:xs -> 1 : length xs
Pattern matching is usually performed in textual order though
there are languages which match more specific patterns before
less specific ones.
2. Descriptive of a type of language or utility such as awk
or Perl which is suited to searching for strings or patterns
in input data, usually using some kind of regular
expression.
(1994-11-28)
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Common Misspellings > |
pattern matching apattern matching apttern matching papttern matching attern matching ppattern matching ptatern matching patatern matching pttern matching paattern matching patttern matching patern matching patttern matching patetrn matching pattetrn matching patern matching patttern matching pattren matching patteren matching pattrn matching patteern matching pattenr matching patternr matching patten matching patterrn matching patter nmatching pattern nmatching patter matching patternn matching patternm atching pattern m atching patternmatching pattern matching pattern amtching pattern mamtching pattern atching pattern mmatching pattern mtaching pattern mataching pattern mtching pattern maatching pattern macthing pattern matcthing pattern maching pattern mattching pattern mathcing pattern matchcing pattern mathing pattern matcching pattern matcihng pattern matchihng pattern matcing pattern matchhing pattern matchnig pattern matchinig pattern matchng pattern matchiing pattern matchign pattern matchingn pattern matchig pattern matchinng pattern matchigng pattern matchin pattern matchingg 0attern matching p0attern matching 0pattern matching )attern matching p)attern matching )pattern matching oattern matching poattern matching opattern matching lattern matching plattern matching lpattern matching pqttern matching paqttern matching pqattern matching pwttern matching pawttern matching pwattern matching psttern matching pasttern matching psattern matching pxttern matching paxttern matching pxattern matching pzttern matching pazttern matching pzattern matching p ttern matching pa ttern matching p attern matching pettern matching pittern matching pottern matching puttern matching pa55ern matching pat55ern matching pa55tern matching pa%%ern matching pat%%ern matching pa%%tern matching pa66ern matching pat66ern matching pa66tern matching parrern matching patrrern matching parrtern matching payyern matching patyyern matching payytern matching paffern matching patffern matching pafftern matching paggern matching patggern matching paggtern matching pahhern matching pathhern matching pahhtern matching patt3rn matching patte3rn matching patt3ern matching patt#rn matching patte#rn matching patt#ern matching patt4rn matching patte4rn matching patt4ern matching pattwrn matching pattewrn matching pattwern matching pattrrn matching patterrn matching pattrern matching pattsrn matching pattesrn matching pattsern matching pattdrn matching pattedrn matching pattdern matching pattfrn matching pattefrn matching pattfern matching pattarn matching pattirn matching pattorn matching patturn matching patte4n matching patter4n matching patte4rn matching patte$n matching patter$n matching patte$rn matching patte5n matching patter5n matching patte5rn matching patteen matching patteren matching patteern matching pattetn matching pattertn matching pattetrn matching pattedn matching patterdn matching pattedrn matching pattefn matching patterfn matching pattefrn matching pattegn matching pattergn matching pattegrn matching patterg matching patterng matching pattergn matching patterh matching patternh matching patterhn matching patterj matching patternj matching patterjn matching patterb matching patternb matching patterbn matching patterm matching patternm matching pattermn matching patter matching pattern matching patter n matching pattern jatching pattern mjatching pattern jmatching pattern katching pattern mkatching pattern kmatching pattern latching pattern mlatching pattern lmatching pattern natching pattern mnatching pattern nmatching pattern atching pattern m atching pattern matching pattern mqtching pattern maqtching pattern mqatching pattern mwtching pattern mawtching pattern mwatching pattern mstching pattern mastching pattern msatching pattern mxtching pattern maxtching pattern mxatching pattern mztching pattern maztching pattern mzatching pattern m tching pattern ma tching pattern m atching pattern metching pattern mitching pattern motching pattern mutching pattern ma5ching pattern mat5ching pattern ma5tching pattern ma%ching pattern mat%ching pattern ma%tching pattern ma6ching pattern mat6ching pattern ma6tching pattern marching pattern matrching pattern martching pattern mayching pattern matyching pattern maytching pattern mafching pattern matfching pattern maftching pattern magching pattern matgching pattern magtching pattern mahching pattern mathching pattern mahtching pattern matshing pattern matcshing pattern matsching pattern matdhing pattern matcdhing pattern matdching pattern matfhing pattern matcfhing pattern matfching pattern matxhing pattern matcxhing pattern matxching pattern matvhing pattern matcvhing pattern matvching pattern mat hing pattern matc hing pattern mat ching pattern matcting pattern matchting pattern matcthing pattern matcying pattern matchying pattern matcyhing pattern matcuing pattern matchuing pattern matcuhing pattern matcging pattern matchging pattern matcghing pattern matcjing pattern matchjing pattern matcjhing pattern matcbing pattern matchbing pattern matcbhing pattern matcning pattern matchning pattern matcnhing pattern matcming pattern matchming pattern matcmhing pattern matc ing pattern match ing pattern matc hing pattern match8ng pattern matchi8ng pattern match8ing pattern match*ng pattern matchi*ng pattern match*ing pattern match9ng pattern matchi9ng pattern match9ing pattern matchung pattern matchiung pattern matchuing pattern matchong pattern matchiong pattern matchoing pattern matchjng pattern matchijng pattern matchjing pattern matchkng pattern matchikng pattern matchking pattern matchlng pattern matchilng pattern matchling pattern matchang pattern matcheng pattern matchigg pattern matchingg pattern matchigng pattern matchihg pattern matchinhg pattern matchihng pattern matchijg pattern matchinjg pattern matchijng pattern matchibg pattern matchinbg pattern matchibng pattern matchimg pattern matchinmg pattern matchimng pattern matchi g pattern matchin g pattern matchi ng pattern matchinr pattern matchingr pattern matchinrg pattern matchint pattern matchingt pattern matchintg pattern matchiny pattern matchingy pattern matchinyg pattern matchinf pattern matchingf pattern matchinfg pattern matchinh pattern matchingh pattern matchinhg pattern matchinv pattern matchingv pattern matchinvg pattern matchinb pattern matchingb pattern matchinbg pattern matchinn pattern matchingn pattern matchinng pattern matchin pattern matching pattern matchin g Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. 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