Hi,
Try with more parentheses:
> l[((which(100420==l))-1):which(100420==l)]
[1] "100419" "100420"
It was interpreted as 4-(1:4)=3 2 1 0
Ivan
Le 6/2/2010 09:41, arnaud Gaboury a écrit :
Dear group,
Here is a list of elements :
l<-
c("100415", "100416", "100419", "100420", "100421", "100422",
"100423", "100426", "100427", "100428", "100429", "100430", "100503",
"100504", "100505", "100506", "100507", "100510", "100511", "100512",
"100513", "100514", "100517", "100518", "100519", "100520", "100521",
"100524", "100525", "100526", "100527", "100528", "100531")
l[3:4]
[1] "100419" "100420" #result is fine
l[(which(100420==l))-1:which(100420==l)]
[1] "100419" "100416" "100415" #can't understand why I do not have same
result than the above line
Thank You for help
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Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
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+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**********
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
