Hi all, I am working on a really big dataset and I would like to vectorize a condition in a if loop to improve speed.
the original loop with the condition is currently writen as follow: if(sum(as.integer(tags$tag_id==tags$tag_id[i]))==1&tags$lgth[i]<300){ tags$stage[i]<-"J" } Do you have some ideas ? I was unable to do it correctly Thanking you in advance for your help Guillaume -- View this message in context: http://r.789695.n4.nabble.com/vectorization-condition-counting-tp4639992.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.