Why not just data.matrix(UN2010) ? --- On Wed, 4/20/11, Haillie <n...@princeton.edu> wrote:
> From: Haillie <n...@princeton.edu> > Subject: [R] Unlist command drops all my column names in the first row and > adopts NAs > To: r-help@r-project.org > Received: Wednesday, April 20, 2011, 11:05 AM > Hi Everyone, > > I am having trouble turning my data.frame into a matrix > format. Because I > wanted to change my data.frame with mostly factor variables > into a numeric > matrix, I used the following code --> > UN2010frame<-data.matrix(lapply(UN2010,as.numeric)) > > However when i checked the mode of the UN2010frame, it > still showed up as a > list. Because the code I want to run (Ordrating) does not > accept data in a > list format, I used UN2010matrix <- unlist(UN2010frame) > to unlist my matrix. > When I did this, my first row ( which was formerly a row > with column names) > turned into NAs. This was a problem for me because when I > tried to run an > ordinal IRT model using this data set, I got the following > error message. > > Error in 1:nrow(Y) : argument of length 0 > > I think it is because all the values in my first row are > now gone.... > > If you could help me on any front, It would be deeply > appreciated. Thank you > very much! > > Haillie > > > -- > View this message in context: > http://r.789695.n4.nabble.com/Unlist-command-drops-all-my-column-names-in-the-first-row-and-adopts-NAs-tp3463294p3463294.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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.
