> -----Original Message----- > From: r-help-boun...@r-project.org > [mailto:r-help-boun...@r-project.org] On Behalf Of Peng Yu > Sent: Wednesday, September 16, 2009 3:33 PM > To: r-h...@stat.math.ethz.ch > Subject: [R] How not to keep the redundant space when convert > a data frame with as.matrix()? > > Hi, > > The first column in as.matrix(x) has extra spaces (" "), which I don't > want. Is there a way not to generate those spaces? > > Regards, > Peng > > > x=data.frame(x=1:10,y=letters[11:20]) > > as.matrix(x) > x y > [1,] " 1" "k" > [2,] " 2" "l" > [3,] " 3" "m" > [4,] " 4" "n" > [5,] " 5" "o" > [6,] " 6" "p" > [7,] " 7" "q" > [8,] " 8" "r" > [9,] " 9" "s" > [10,] "10" "t" >
You have asked several questions about using as.matrix() on a data.frame with colums of different types, in particular character and numeric types. Since matrices can only have one type, your numerics are coerced to character. Is this what you really want? Is there some reason you can't use a data.frame? Enquiring minds want to know? Dan Daniel Nordlund Bothell, WA USA ______________________________________________ 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.
