Re: [R] convert a data.frame to matrix

2013-05-16 Thread peter dalgaard
On May 17, 2013, at 01:59 , David Winsemius wrote: > > On May 16, 2013, at 1:46 PM, Hermann Norpois wrote: > >> Hello, >> >> I fail to tranfer data from a dataframe to a matrix. >> >> jam is from a dataframe (and belongs still to the class dataframe) and >> should look like m (see below). >>

Re: [R] convert a data.frame to matrix

2013-05-16 Thread David Winsemius
On May 16, 2013, at 1:46 PM, Hermann Norpois wrote: > Hello, > > I fail to tranfer data from a dataframe to a matrix. > > jam is from a dataframe (and belongs still to the class dataframe) and > should look like m (see below). > >> jam > vec1 vec3 d1 d2 > 1 172 173 223 356 >> dput (jam) >

Re: [R] convert a data.frame to matrix

2013-05-16 Thread Sarah Goslee
Why not simply: > matrix(jam, ncol=2) [,1] [,2] [1,] 172 223 [2,] 173 356 On Thu, May 16, 2013 at 4:46 PM, Hermann Norpois wrote: > Hello, > > I fail to tranfer data from a dataframe to a matrix. > > jam is from a dataframe (and belongs still to the class dataframe) and > should look like

[R] convert a data.frame to matrix

2013-05-16 Thread Hermann Norpois
Hello, I fail to tranfer data from a dataframe to a matrix. jam is from a dataframe (and belongs still to the class dataframe) and should look like m (see below). > jam vec1 vec3 d1 d2 1 172 173 223 356 > dput (jam) structure(list(vec1 = 172L, vec3 = 173L, d1 = 223L, d2 = 356L), .Names = c