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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