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< h1 > Pattern Matching< / h1 >
< div class = "hidden name" > < code > like.Rd< / code > < / div >
< / div >
< div class = "ref-description" >
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< p > Convenient wrapper around < code > < a href = 'https://www.rdocumentation.org/packages/base/topics/grep' > grep< / a > < / code > to match a pattern: < code > a %like% b< / code > . It always returns a < code > logical< / code > vector and is always case-insensitive (use < code > a %like_case% b< / code > for case-sensitive matching). Also, < code > pattern< / code > (< code > b< / code > ) can be as long as < code > x< / code > (< code > a< / code > ) to compare items of each index in both vectors, or can both have the same length to iterate over all cases.< / p >
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< / div >
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< pre class = "usage" > < span class = 'fu' > like< / span > (< span class = 'no' > x< / span > , < span class = 'no' > pattern< / span > , < span class = 'kw' > ignore.case< / span > < span class = 'kw' > =< / span > < span class = 'fl' > TRUE< / span > )
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< span class = 'no' > x< / span > < span class = 'kw' > %like%< / span > < span class = 'no' > pattern< / span >
< span class = 'no' > x< / span > < span class = 'kw' > %like_case%< / span > < span class = 'no' > pattern< / span > < / pre >
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< h2 class = "hasAnchor" id = "arguments" > < a class = "anchor" href = "#arguments" > < / a > Arguments< / h2 >
< table class = "ref-arguments" >
< colgroup > < col class = "name" / > < col class = "desc" / > < / colgroup >
< tr >
< th > x< / th >
< td > < p > a character vector where matches are sought, or an
object which can be coerced by < code > as.character< / code > to a character
vector. < a href = 'https://www.rdocumentation.org/packages/base/topics/LongVectors' > Long vectors< / a > are supported.< / p > < / td >
< / tr >
< tr >
< th > pattern< / th >
< td > < p > character string containing a < a href = 'https://www.rdocumentation.org/packages/base/topics/regex' > regular expression< / a >
(or character string for < code > fixed = TRUE< / code > ) to be matched
in the given character vector. Coerced by
< code > < a href = 'https://www.rdocumentation.org/packages/base/topics/character' > as.character< / a > < / code > to a character string if possible. If a
character vector of length 2 or more is supplied, the first element
is used with a warning. Missing values are allowed except for
< code > regexpr< / code > and < code > gregexpr< / code > .< / p > < / td >
< / tr >
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< tr >
< th > ignore.case< / th >
< td > < p > if < code > FALSE< / code > , the pattern matching is < em > case
sensitive< / em > and if < code > TRUE< / code > , case is ignored during matching.< / p > < / td >
< / tr >
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< / table >
< h2 class = "hasAnchor" id = "source" > < a class = "anchor" href = "#source" > < / a > Source< / h2 >
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< p > Idea from the < a href = 'https://github.com/Rdatatable/data.table/blob/master/R/like.R' > < code > like< / code > function from the < code > data.table< / code > package< / a > , but made it case insensitive at default and let it support multiple patterns. Also, if the regex fails the first time, it tries again with < code > perl = TRUE< / code > .< / p >
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< h2 class = "hasAnchor" id = "value" > < a class = "anchor" href = "#value" > < / a > Value< / h2 >
< p > A < code > logical< / code > vector< / p >
< h2 class = "hasAnchor" id = "details" > < a class = "anchor" href = "#details" > < / a > Details< / h2 >
< p > Using RStudio? This function can also be inserted from the Addins menu and can have its own Keyboard Shortcut like Ctrl+Shift+L or Cmd+Shift+L (see Tools > Modify Keyboard Shortcuts...).< / p >
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< h2 class = "hasAnchor" id = "read-more-on-our-website-" > < a class = "anchor" href = "#read-more-on-our-website-" > < / a > Read more on our website!< / h2 >
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< p > On our website < a href = 'https://msberends.gitlab.io/AMR' > https://msberends.gitlab.io/AMR< / a > you can find < a href = 'https://msberends.gitlab.io/AMR/articles/AMR.html' > a tutorial< / a > about how to conduct AMR analysis, the < a href = 'https://msberends.gitlab.io/AMR/reference' > complete documentation of all functions< / a > (which reads a lot easier than here in R) and < a href = 'https://msberends.gitlab.io/AMR/articles/WHONET.html' > an example analysis using WHONET data< / a > .< / p >
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< h2 class = "hasAnchor" id = "see-also" > < a class = "anchor" href = "#see-also" > < / a > See also< / h2 >
< div class = 'dont-index' > < p > < code > < a href = 'https://www.rdocumentation.org/packages/base/topics/grep' > grep< / a > < / code > < / p > < / div >
< h2 class = "hasAnchor" id = "examples" > < a class = "anchor" href = "#examples" > < / a > Examples< / h2 >
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< pre class = "examples" > < span class = 'co' > # NOT RUN {< / span >
< span class = 'co' > # simple test< / span >
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< span class = 'no' > a< / span > < span class = 'kw' > < -< / span > < span class = 'st' > "This is a test"< / span >
< span class = 'no' > b< / span > < span class = 'kw' > < -< / span > < span class = 'st' > "TEST"< / span >
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< span class = 'no' > a< / span > < span class = 'kw' > %like%< / span > < span class = 'no' > b< / span >
< span class = 'co' > #> TRUE< / span >
< span class = 'no' > b< / span > < span class = 'kw' > %like%< / span > < span class = 'no' > a< / span >
< span class = 'co' > #> FALSE< / span >
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< span class = 'co' > # also supports multiple patterns, length must be equal to x< / span >
< span class = 'no' > a< / span > < span class = 'kw' > < -< / span > < span class = 'fu' > < a href = 'https://www.rdocumentation.org/packages/base/topics/c' > c< / a > < / span > (< span class = 'st' > "Test case"< / span > , < span class = 'st' > "Something different"< / span > , < span class = 'st' > "Yet another thing"< / span > )
< span class = 'no' > b< / span > < span class = 'kw' > < -< / span > < span class = 'fu' > < a href = 'https://www.rdocumentation.org/packages/base/topics/c' > c< / a > < / span > (< span class = 'st' > "case"< / span > , < span class = 'st' > "diff"< / span > , < span class = 'st' > "yet"< / span > )
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< span class = 'no' > a< / span > < span class = 'kw' > %like%< / span > < span class = 'no' > b< / span >
< span class = 'co' > #> TRUE TRUE TRUE< / span >
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< span class = 'co' > # get frequencies of bacteria whose name start with 'Ent' or 'ent'< / span >
< span class = 'fu' > < a href = 'https://www.rdocumentation.org/packages/base/topics/library' > library< / a > < / span > (< span class = 'no' > dplyr< / span > )
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< span class = 'fu' > < a href = 'https://www.rdocumentation.org/packages/base/topics/library' > library< / a > < / span > (< span class = 'no' > clean< / span > )
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< span class = 'no' > example_isolates< / span > < span class = 'kw' > %> %< / span >
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< span class = 'fu' > < a href = 'join.html' > left_join_microorganisms< / a > < / span > () < span class = 'kw' > %> %< / span >
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< span class = 'fu' > < a href = 'https://dplyr.tidyverse.org/reference/filter.html' > filter< / a > < / span > (< span class = 'no' > genus< / span > < span class = 'kw' > %like%< / span > < span class = 'st' > '^ent'< / span > ) < span class = 'kw' > %> %< / span >
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< span class = 'fu' > < a href = 'https://www.rdocumentation.org/packages/clean/topics/freq' > freq< / a > < / span > (< span class = 'no' > genus< / span > , < span class = 'no' > species< / span > )
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< span class = 'co' > # }< / span > < / pre >
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< li > < a href = "#source" > Source< / a > < / li >
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< p > Developed by < a href = 'https://www.rug.nl/staff/m.s.berends/' > Matthijs S. Berends< / a > , < a href = 'https://www.rug.nl/staff/c.f.luz/' > Christian F. Luz< / a > , < a href = 'https://www.rug.nl/staff/a.w.friedrich/' > Alex W. Friedrich< / a > , < a href = 'https://www.rug.nl/staff/b.sinha/' > Bhanu N. M. Sinha< / a > , < a href = 'https://www.rug.nl/staff/c.j.albers/' > Casper J. Albers< / a > , < a href = 'https://www.rug.nl/staff/c.glasner/' > Corinna Glasner< / a > .< / p >
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