Maybe you want something like this.

temp<-data.frame(id=rbinom(10,5,.5),grp=rbinom(10,3,.3),stdid=rnorm(10))
kk<-"stdid"
temp[,kk]

-tgs


On Tue, Apr 20, 2010 at 7:32 AM, venkata kirankumar
<kiran4u2all@gmail.com>wrote:

> Hi all,
> I have a problem with retreaving column from a data.frame that is
>
> I have a data.frame named  "temp"
> in that dataframe some column  are there whose names are
>
> "IDENTIFIER"    "UNIQUEID"      "TRIALGROUPSID" "GRPNUMBER"
> "GRPDESC"       "SEXDID"        "STDID"         "STUDYTYPE"
> "SDID"          "DOSDID"        "SOPDID"        "SPECIES"
>
> i can retreave any column with using  command like  "temp$STDID"
>
> but my problem is  the column name i have to get from another xml its
> comming like  "STDID"
> that one i assigned to a variable named    "kk"  like  kk<-"STDID"
>
> but now while i am trying to retreave this column from dataframe  temp
> like  temp$kk   or
>  with using command paste like
>
> paste("temp",kk,sep"$")
> both the times its giving null result
> but its having values in table
>
> can any one help me how to get column values from dataframe like these
> cases
>
> thanks in advance
> kiran
>
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