R help - Nov 2011 - Create an identifier variable

I am needing to create a new identifier variable for a data set which has no
ID variable in the original file. I am basically wanting to take the count
of each row and add "sd" in front of it - so it would look like so

sd1
sd2
sd3
sd4
sd5 etc.......

I have no idea how to do this. I am a SAS user trying to learn R. This
question may have been answered previously, but I could be searching for it
incorrectly. Thank you for any assistance you can provide. 

HyunJee

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Try something like this:

Suppose your data object is called df:

cbind(paste("sd", 1:NROW(df), sep = ""), df)

If you are just moving from SAS check out the website (and books
associated with) http://r4stats.com -- it's got some tutorials on
moving from other platforms to R.

Michael

On Tue, Nov 29, 2011 at 2:48 PM, hyunjeehale <hyunjee.hale at gmail.com>
wrote:
> I am needing to create a new identifier variable for a data set which has
no
> ID variable in the original file. I am basically wanting to take the count
> of each row and add "sd" in front of it - so it would look like
so
>
> sd1
> sd2
> sd3
> sd4
> sd5 etc.......
>
> I have no idea how to do this. I am a SAS user trying to learn R. This
> question may have been answered previously, but I could be searching for it
> incorrectly. Thank you for any assistance you can provide.
>
> HyunJee
>
> --
> View this message in context:
http://r.789695.n4.nabble.com/Create-an-identifier-variable-tp4120548p4120548.html
> Sent from the R help mailing list archive at Nabble.com.
>
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