z2.0
2012-Mar-27 23:02 UTC
[R] Unique instances of a string in a vector -- there must be a better way to do this
I'm sure there's a better way to do this using plyr. I just can't nail the right series of commands. I've got a vector of strings. I want to remove all where the string's count within the vector is > 1. Right now I'm using: Where x2 is the original data.frame and my character strings live in x2[,3]. Based on my results, that looks like it works, though if someone looks at the code and raises an eyebrow, please feel free to say why. R 2.14.2. Windows 7, 64-bit. Thanks, Zack -- View this message in context: http://r.789695.n4.nabble.com/Unique-instances-of-a-string-in-a-vector-there-must-be-a-better-way-to-do-this-tp4510489p4510489.html Sent from the R help mailing list archive at Nabble.com.
R. Michael Weylandt
2012-Mar-28 04:04 UTC
[R] Unique instances of a string in a vector -- there must be a better way to do this
It's a bit of a hack, but I think you can try something like this: x <- c(1,2,3,4,5,2,5) duplicated(x) | duplicated(x, fromLast=T) Michael On Tue, Mar 27, 2012 at 7:02 PM, z2.0 <zack.abrahamson at gmail.com> wrote:> I'm sure there's a better way to do this using plyr. I just can't nail the > right series of commands. > > I've got a vector of strings. I want to remove all where the string's count > within the vector is > 1. > > Right now I'm using: > > > > Where x2 is the original data.frame and my character strings live in x2[,3]. > Based on my results, that looks like it works, though if someone looks at > the code and raises an eyebrow, please feel free to say why. > > R 2.14.2. Windows 7, 64-bit. > > Thanks, > > Zack > > -- > View this message in context: http://r.789695.n4.nabble.com/Unique-instances-of-a-string-in-a-vector-there-must-be-a-better-way-to-do-this-tp4510489p4510489.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help at 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.