text_combined: milton ruser miltonrusergmailcom try foo1 functionval returndval foo1x good luck miltinho astronauta brazil 8608 faheem mitha wrote hi consider following x c12 c34 dataframecbindxy dx 1 1 2 dx 1 1 2 foo functionval returndval bar function returndx foox null bar 1 1 2 im little surprised r accepts form dx dx im mostly wondering foox doesnt work thanks faheem ______________________________________________ rhelprprojectorg mailing list httpsstatethzchmailmanlistinforhelp please read posting guide httpwwwrprojectorgpostingguidehtml provide commented minimal selfcontained reproducible code alternative html version deleted ______________________________________________ rhelprprojectorg mailing list httpsstatethzchmailmanlistinforhelp please read posting guide httpwwwrprojectorgpostingguidehtml provide commented minimal selfcontained reproducible code wed 06 aug 2008 132005 0300 r subsetting column name string