From: Simone Gabbriellini <ogabbrie_at_tin.it>

Date: Thu 04 Aug 2005 - 08:25:15 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 08:32:43 2005

Date: Thu 04 Aug 2005 - 08:25:15 EST

how can I have a 0 evaluated in my loop then? it is important for my algorithm

Il giorno 03/ago/05, alle ore 23:37, Marc Schwartz ha scritto:

> 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
**>
**>
**>
**>
*

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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 08:32:43 2005

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