Hello World, I have a function that makes pairwise comparisons between two strings. I would like to apply this function to my data (which consists of columns with different strings) in the way that it compares the first with the second entry, and then the third with the fourth, and then the fifth with the sixth, and so on down each column... So (2x-1) and (2x) would be the different entries to be compared!
dat= my data: for the first column: compare dat[(2x-1),1] with dat[(2x),1] and x would be 1:i, i=length(dat[,1]) I think the best way to do that is a loop: a <- as.character(dat[(2x-1),1]) b <- as.character(dat[(2x),1]) for (i in 1:length(dat[,1]) my_function(a, b)) Can somebody help me to apply a function with a loop in the way I want to a column? Is there a specification of "tapply" for that? Thank you very much, Laetitia ---------------------------------------------------------------------------- Laetitia G. Schmid Master Student of Evolutionary Genetics in Marine Mammals Department of Genetics, Microbiology and Toxicology Stockholm University Svante Arrheniusväg 16 10691 Stockholm, Sweden private: Laetitia G. Schmid c/o Von Ahn Sköntorpsvägen 100 12053 Stockholm Sverige +46 70 651 0185 laeti...@gmt.su.se ______________________________________________ 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.
