[R] Unique instances of a string in a vector -- there must be a better way to do this

R. Michael Weylandt michael.weylandt at gmail.com
Wed Mar 28 06:04:43 CEST 2012

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)


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
> --
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