Not sure i explained it good enough. Ill try with an example say
x=[3,3,4,4,4,4,5,5,6,8] z=[3,4,4,5,5] what i want to get after removing z from x is something like x=[3,4,4,6,8] On Nov 15, 2007 3:29 PM, Charilaos Skiadas <[EMAIL PROTECTED]> wrote: > > > On Nov 15, 2007, at 9:15 AM, Thomas Frööjd wrote: > > > Hi > > > > I have three vectors say x, y, z. One of them, x contains observations > > on a variable. To x I want to append all observations from y and > > remove all from z. For appending c() is easily used > > > > x <- c(x,y) > > > > But how do I remove all observations in z from x? You can say I am > > looking for the opposite of c(). > > If you are looking for the opposite of c, provided you want to remove > the first part of things, then perhaps this would work: > > z<-c(x,y) > z[-(1:length(x))] > > However, if you wanted to remove all appearances of elements of x > from c(x,y), regardless of whether those elements appear in the x > part of in the y part, I think you would want: > > z[!z %in% x] > > Probably there are other ways. > > Welcome to R! > > > Best regards > > Haris Skiadas > Department of Mathematics and Computer Science > Hanover College > > ______________________________________________ > 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. > ______________________________________________ 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.
