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
The correct line is :> l[(which(100420==l)-1):which(100420==l)][1] "100419" "100420"> -----Original Message----- > From: arnaud Gaboury [mailto:arnaud.gaboury at gmail.com] > Sent: Wednesday, June 02, 2010 9:41 AM > To: r-help at r-project.org > Cc: 'arnaud Gaboury' > Subject: which function > > 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
Hi Arnaud Try this l[((which(100420==l))-1):which(100420==l)] Regards Mo arnaud Gaboury <arnaud.gaboury at gmail.com> a ?crit?:> 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 > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >
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 ?crit :> 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 > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > >-- Ivan CALANDRA PhD Student University of Hamburg Biozentrum Grindel und Zoologisches Museum Abt. S?ugetiere Martin-Luther-King-Platz 3 D-20146 Hamburg, GERMANY +49(0)40 42838 6231 ivan.calandra at uni-hamburg.de ********** http://www.for771.uni-bonn.de http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php