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) [1] 1 > grep("em", month.name) [1] 9 11 12 > grep("eb", month.name) [1] 2 > grep(c("an", "em", "eb"), month.name) [1] 1 Warning message: In grep(c("an", "em", "eb"), 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 ) ) 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 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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