From: Marc Schwartz <MSchwartz_at_mn.rr.com>

Date: Thu 04 Aug 2005 - 07:37:30 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Aug 04 07:43:13 2005

Date: Thu 04 Aug 2005 - 07:37:30 EST

On Wed, 2005-08-03 at 23:24 +0200, Simone Gabbriellini wrote:

> 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
**>
**> thank you,
**> simone
*

No....the indexing of R objects is 1 based. Thus your first loop tried to set i[0], which is a non-existent entry.

> i <- 0:5

*> i
*

[1] 0 1 2 3 4 5

*> i[0]
*

numeric(0)

*> i[1]
*

[1] 0

**HTH,
**
Marc Schwartz

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Thu Aug 04 07:43:13 2005

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