The correct line is : > l[(which(100420==l)-1):which(100420==l)] [1] "100419" "100420"
> -----Original Message----- > From: arnaud Gaboury [mailto:arnaud.gabo...@gmail.com] > Sent: Wednesday, June 02, 2010 9:41 AM > To: r-help@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 ______________________________________________ R-help@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.