YES IT WORKED!!! Many thanks JiHO
-------------------------------------------- Vincent Deluard <mailto:vincent.delu...@trimtabs.com> vincent.delu...@trimtabs.com Global Equity Strategist, CFA Charter Award Pending TrimTabs Investment Research 40 Wall Street, 28th Floor New York, NY 10005 Phone: (+1) 646-512-5616 From: JiHO-2 [via R] [mailto:ml-node+2131575-1078352091-90...@n4.nabble.com] Sent: Wednesday, May 05, 2010 3:51 PM To: vincent.deluard Subject: Re: read.table or read.csv without row index? > I tried as.matrix but it did not help. as.matrix() won't work because a matrix requires everything in it to be of the same type (number, character, logical etc.). You do not have only numbers in your data.frame, so it will convert everything to character strings. If you try as.matrix(temp[,-1]) it should work (assuming you only have characters in the first column, otherwise remove all non-numeric columns). But what you really want is to circumvent the fact that, on a data.frame, mean works column-wise. In fact, when you call mean() on a data.frame() it calls mean.data.frame(), which code you can see by typing its name at the prompt: > mean.data.frame function (x, ...) sapply(x, mean, ...) <environment: namespace:base> And indeed, it uses sapply() to apply the function mean to each column. You could have tried: mean.default(temp[2,2:3]) but this returns and error because it needs a numeric vector and does not automatically convert your data.frame into it. So you need: mean.default(as.numeric(temp[2,2:3])) or more simply mean(as.numeric(temp[2,2:3])) I hope that helped. Sincerely, JiHO --- http://maururu.net ______________________________________________ [hidden email] 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. _____ View message @ http://r.789695.n4.nabble.com/read-table-or-read-csv-without-row-index-tp883594p2131575.html To unsubscribe from Re: read.table or read.csv without row index?, click < (link removed) AwNTU4Mzk3> here. -- View this message in context: http://r.789695.n4.nabble.com/read-table-or-read-csv-without-row-index-tp883594p2131597.html Sent from the R help mailing list archive at Nabble.com. [[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.
