On Mar 7, 2008, at 10:50 AM, zhihuali wrote: > > Hi, netters, > > This is probably a rookie question but I couldn't find the answer > after hours of searching and trying. > > Suppose there'a a dataframe M: > > x y > 10 A > 13 B > 8 A > 11 A > > I want to locate the rows where x >=10 and y="A". I know how to do > it to vectors by using > which, but how to do it with the dataframe? >
Does ?subset do what you want? > Thank you very much! > > > Zhihua Li > 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.