Hi, You could try plyr,
library(plyr) ddply(d,.(Name), tail,1) Name Value 1 A 3 2 B 8 3 C 2 4 D 3 HTH, baptiste 2009/11/16 Hao Cen <[email protected]>: > Hi, > > I would like to extract the last row of each group in a data frame. > > The data frame is as follows > > Name Value > A 1 > A 2 > A 3 > B 4 > B 8 > C 2 > D 3 > > I would like to get a data frame as > Name Value > A 3 > B 8 > C 2 > D 3 > > Thank you for your suggestions in advance > > Jeff > > ______________________________________________ > [email protected] 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. > ______________________________________________ [email protected] 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.
