Message-ID: <x2irymu2lp.fsf@turmalin.kubism.ku.dk>
Date: 2005-08-03T21:34:10Z
From: Peter Dalgaard
Subject: problem with for()
In-Reply-To: <5860A155-CE7B-4BDF-A184-282E5D23F9F4@tin.it>
Simone Gabbriellini <ogabbrie at tin.it> writes:
> Dear list,
> can someone tell me why this two pieces of code give me the same
> results?
>
> > for(i in 0:5){ sum[i] = i }
> > sum
> [1] 1 2 3 4 5
>
> > for(i in 1:5){ sum[i] = i }
> > sum
> [1] 1 2 3 4 5
>
> shouldn't the first one be
>
> 0 1 2 3 4 5
No. Indexing starts at 1 in R.
Next, figure out this:
> sum=0
> for(i in 5:-5){ sum[i] = i }
> sum
[1] -5 -5 -5 -5 -4
--
O__ ---- Peter Dalgaard ??ster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX: (+45) 35327907