Hi all I am manipulating a datafram which has 3 variables.Such as:
1 2 3 4 5 6 . . . 200 210 300 I also has a row index: index=c(100,200,250..300) I want to find the sums of first 100 rows, then the sum from row 101 to row 200, then row 201 to row 250... the each end row is indicated by the index. Can I use the apply function to do that? or any other way? Thanks Ted -- View this message in context: http://www.nabble.com/Apply-function-tp20434042p20434042.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
