On 02/13/14, 17:23 , jim holtman wrote: > use the "|" in regular expressions: > > grep(c("an|em|eb", month.name <http://month.name/>)
Thanks - again a reason to learn regexp. Cheers, Rainer > > > Jim Holtman > Data Munger Guru > > What is the problem that you are trying to solve? > Tell me what you want to do, not how you want to do it. > > > On Thu, Feb 13, 2014 at 9:43 AM, Rainer M Krug <rai...@krugs.de > <mailto:rai...@krugs.de>> wrote: > > Hi > > I want to search for multiple pattern as grep is doing for a single > pattern, but this obviously not work: > > > grep("an", month.name <http://month.name>) > [1] 1 > > grep("em", month.name <http://month.name>) > [1] 9 11 12 > > grep("eb", month.name <http://month.name>) > [1] 2 > > grep(c("an", "em", "eb"), month.name <http://month.name>) > [1] 1 > Warning message: > In grep(c("an", "em", "eb"), month.name <http://month.name>) : > argument 'pattern' has length > 1 and only the first element will > be used > > > > Is there an equivalent which returns the positions as grep is doing, but > not using the strict full-string matching of match()? > > I could obviously do: > > > unlist( sapply(pat, grep, month.name <http://month.name> ) ) > an em1 em2 em3 eb > 1 9 11 12 2 > > but is there a more compact command I am missing? > > Thanks, > > Rainer > > -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation > Biology, UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Stellenbosch University > South Africa > > Tel : +33 - (0)9 53 10 27 44 > <tel:%2B33%20-%20%280%299%2053%2010%2027%2044> > Cell: +33 - (0)6 85 62 59 98 > <tel:%2B33%20-%20%280%296%2085%2062%2059%2098> > Fax : +33 - (0)9 58 10 27 44 > <tel:%2B33%20-%20%280%299%2058%2010%2027%2044> > > Fax (D): +49 - (0)3 21 21 25 22 44 > <tel:%2B49%20-%20%280%293%2021%2021%2025%2022%2044> > > email: rai...@krugs.de <mailto:rai...@krugs.de> > > Skype: RMkrug > > > ______________________________________________ > R-help@r-project.org <mailto:R-help@r-project.org> mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, UCT), Dipl. Phys. (Germany) Centre of Excellence for Invasion Biology Stellenbosch University South Africa Tel : +33 - (0)9 53 10 27 44 Cell: +33 - (0)6 85 62 59 98 Fax : +33 - (0)9 58 10 27 44 Fax (D): +49 - (0)3 21 21 25 22 44 email: rai...@krugs.de Skype: RMkrug
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______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.