Dimitri Liakhovitski-2 wrote: > > Hello! > > I've tried for a while - but can't figure it out. I have data frame x: > > y=c("a","b","c","d","e") > z=c("m","n","o","p","r") > a=c(0,0,1,0,0) > b=c(2,0,0,0,0) > c=c(0,0,0,4,0) > x<-data.frame(y,z,a,b,c,stringsAsFactors=F) > str(x) > Some of the values in columns a,b, and c are >0: > > I need to write a loop through all the cells in columns a,b,c that are >>0 (only through them). > For each of those cells, I need to know: > 1. Name of the column it is in > 2 The entry of column y that is in the same row > 3 The entry of column z that is in the same row > It'd be good to save this info in a data frame somehow - so that I > could loop through rows of this data frame. >
This will give you a dataframe x[-which(rowSums(x[,3:5]>0)==0),] or this x[-which(rowSums(x[,c("a","b","c")]>0)==0),] Berend -- View this message in context: http://r.789695.n4.nabble.com/Looping-through-values-in-a-data-frame-that-are-zero-tp3540579p3540752.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.