On May 21, 2007, at 8:21 AM, elyakhlifi mustapha wrote: > I know how to do to write down the columns in a data frame but I > also wanna write down the lines . > Do you know how could I do this?
I'm not sure what you mean by "write down the lines". If you mean that you want to know what the row names are, then an answer is: df <- data.frame(x1 = rnorm(3), x2 = rnorm(3)) names(df) # just to show that I gave the columns names while defining df rownames(df) If you mean that you want to assign names to the rows, then df <- data.frame(rnorm(3), rnorm(3)) names(df) <- c('y1', 'y2') # not required rownames(df) <- c('a', 'b', 'c') In one commandt: df <- data.frame(x1 = rnorm(3), x2 = rnorm(3), row.names = c('a', 'b', 'c')) More detailed: df <- data.frame(x1 = rnorm(3), x2 = rnorm(3), row.names = c('a', 'b', 'c'), check.rows = TRUE, check.names = TRUE) **** More importantly you could have found all this out by typing ?data.frame **** I have seen several posts from you that seem to be rather elementary questions, sometimes not using the correct terminology ('write down' and 'lines of a data frame' are not standard). Have you taken the time to go through any of the many introductions to R available on line? Also, you're not asking your questions well (this comment is not about knowing English well): You would have been better off asking: "I have a data frame df <- data.frame(x1 = rnorm(3), x2 = rnorm(3)) How do I ....? " _____________________________ Professor Michael Kubovy University of Virginia Department of Psychology USPS: P.O.Box 400400 Charlottesville, VA 22904-4400 Parcels: Room 102 Gilmer Hall McCormick Road Charlottesville, VA 22903 Office: B011 +1-434-982-4729 Lab: B019 +1-434-982-4751 Fax: +1-434-982-4766 WWW: http://www.people.virginia.edu/~mk9y/ ______________________________________________ R-help@stat.math.ethz.ch 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.