or .... d = data.frame(Col1=c(1,2,3),Col2=c(2,3,4),Col3=c(3,4,5)) names(d) names(d)[1] = "NewName1" names(d) HTH Pete -- View this message in context: http://r.789695.n4.nabble.com/data-frame-column-name-change-tp3220684p3221214.html Sent from the R help mailing list archive at Nabble.com.