HI, I guess you were talking about column names instead of rownames.
If you have a data like the one below to read: dat1<-read.table(text=" beta0 beta1 pvalor Crom rs17 158.5980 12.252462 9.083193e-135 1 rs46 163.3730 3.304276 3.279925e-06 1 rs63 162.7924 2.084678 5.023893e-06 1 rs24 162.4252 1.837208 5.509042e-06 1 ",sep="",header=TRUE,row.names=NULL) Here, you have column names for four columns, so if you don't add row.names=NULL, then the first column will become the row names. Now, for the second case: column names will be automatically generated with data frames if your data doesn't have one. dat2<-read.table(text=" 158.5980 12.252462 9.083193e-135 1 163.3730 3.304276 3.279925e-06 1 162.7924 2.084678 5.023893e-06 1 162.4252 1.837208 5.509042e-06 1 ",sep="",header=FALSE) colnames(dat2)<-NULL # will create NA's as column names. colnames(dat2)<-c(1,2,3,4) # will replace V1,V2, etc. with 1,2,.. Bu, converting to matrix, can solve this problem in this case, dat3<-as.matrix(dat2) colnames(dat3)<-NULL dat3 # [,1] [,2] [,3] [,4] #[1,] 158.5980 12.252462 9.083193e-135 1 #[2,] 163.3730 3.304276 3.279925e-06 1 #[3,] 162.7924 2.084678 5.023893e-06 1 #[4,] 162.4252 1.837208 5.509042e-06 1 Is there any specific reason to eliminate the column names?? A.K. ----- Original Message ----- From: li li <hannah....@gmail.com> To: r-help <r-help@r-project.org> Cc: Sent: Wednesday, August 15, 2012 5:04 PM Subject: [R] Import Data from Excel Dear all, I want to import just part of an excel data file into R. I would like to have the data imported without rownames or colume names. I used read.delim("clipboard", header=F). Somehow even though I added the argument "header=F", I still have the row names V1, V2, ..., Does anyone know how to fix this? Thanks very much in advance. Hannah [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.