[R] Newbie query - reading data into R
Peter Dalgaard BSA
p.dalgaard at biostat.ku.dk
Tue Jan 26 16:51:25 CET 1999
Prof Brian Ripley <ripley at stats.ox.ac.uk> writes:
> > > Number
> > > Napier 324
> > > Auckland 657
> > > Wellington 879
> > > Christchurch 904
> > >
> > > works on your example (with tabs in the file).
> > >
> > > (S-PLUS behaves differently here, and guesses the first column
> > > should be the row names without being told).
> >
> > So does read.table on Unix - I don't remember it doing anything else?
> (On R? Your own example shows it does not!)
Whooops. I assumed that the input file had had the "City" header
removed when I saw that display. I honestly didn't believe that S-plus
could be that silly (it scans the variables, grabs the first
nonnumeric one that has no duplicated values and uses it for
rownames!):
> On Splus 3.4:
> > read.table("test.dat", header=T)
> Number
> Napier 324
..
> which is not the same as R 0.63.2:
> > read.table("test.dat", header=T)
> City Number
> 1 Napier 324
..
>
> is it? That was my point: read.table in R and S-PLUS are subtly different.
Agreed. However, even after noticing the difference, I really don't
think that that bit of S-plus behaviour is worth cloning.
(S-plus, after duplicating the Wellington line:)
> read.table('tmp/testdata',header=T)
City Number
1 Napier 324
2 Auckland 657
3 Wellington 879
4 Wellington 879
5 Christchurch 904
--
O__ ---- Peter Dalgaard Blegdamsvej 3
c/ /'_ --- Dept. of Biostatistics 2200 Cph. N
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907
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