Looks like a bug to me. Compare: > match (1:3,1:3,incom=3) [1] 1 2 3 > match (1:3,1:3,incom=2:3) [1] 1 2 3 > match (1:3,1:3,incom=1:2) [1] NA NA 3 > match (1:3,1:3,incom=1) [1] NA 2 3
Cheers, Bert -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Adam D. I. Kramer Sent: Friday, September 12, 2008 3:06 PM To: McGehee, Robert Cc: r-help Subject: Re: [R] match and incomparables I can replicate this and also do not understand it. > match(1:3,1:3,incomparables=5) [1] NA 2 3 > match(1:3,1:3,incomparables=4) [1] 1 2 3 > match(1:3,1:3,incomparables=3) [1] 1 2 3 > match(1:3,1:3,incomparables=2) [1] 1 2 3 > match(1:3,1:3,incomparables=1) [1] NA 2 3 ...every other integer value for incomparables produces 1 2 and 3 for output. I'm using R 2.7.2, self-compiled, under linux. --Adam On Fri, 12 Sep 2008, McGehee, Robert wrote: > Hello, > I was playing around with the newly implemented 'incomparables' argument > in 'match' and realized the argument does not behave anything like I > expected. Can someone explain what is going on here? Sorry if I'm > misreading the documentation. > >> match(1:3, 1:3, incomparables=1) > [1] NA 2 3 # This seems right, the 1 in 'x' is 'incomparable' > >> match(1:3, 1:3, incomparables=2) > [1] 1 2 3 # Shouldn't this be 1 NA 3? Why isn't the 2 incomparable? > >> match(1:3, 1:3, incomparables=5) > [1] NA 2 3 # Why isn't the 5 ignored? > > Note from ?match: > "incomparables: a vector of values that cannot be matched. Any value in > x matching a value in this vector is assigned the nomatch value. For > historical reasons, FALSE is equivalent to NULL." > > Thanks in advance! > Robert > > platform i386-pc-mingw32 > arch i386 > os mingw32 > system i386, mingw32 > status > major 2 > minor 7.2 > year 2008 > month 08 > day 25 > svn rev 46428 > language R > version.string R version 2.7.2 (2008-08-25) > > Robert McGehee, CFA > Geode Capital Management, LLC > One Post Office Square, 28th Floor | Boston, MA | 02109 > Tel: 617/392-8396 Fax:617/476-6389 > mailto:[EMAIL PROTECTED] > > > > This e-mail, and any attachments hereto, are intended fo...{{dropped:12}} > > ______________________________________________ > 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. > ______________________________________________ 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. ______________________________________________ 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.
