Hello R users, This is more of a convenience question that I hope others might find useful if there is a better answer. I work with large datasets that requires multiple parsing stages for different analysis. For example, compare group 3 vs. group 4. A more complicated comparison would be time B in group 3 of group L with B in group 4 of group L. I normally subset each group with the following type of code.
data=read(...) #L v D L=data[LvD %in% c("L"),] D=data[LvD %in% c("D"),] #Groups 3 and 4 within L and D group3L=L[group %in% c("3"),] group4L=L[group %in% c("3"),] group3D=D[group %in% c("3"),] group4D=D[group %in% c("3"),] #Times B, S45, FR2, FR8 you get the idea Is there a more efficient way to subset groups? Thanks for any insight. Regards, Charles [[alternative HTML version deleted]] ______________________________________________ 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.