Hi Eik, greetings to Hamburg! :-) Thanks for the fast and helpful answer
Eik Vettorazzi-2 wrote: > > #compare > str(red[,2]) > str(red[2,]) > I understand that the first is a real vector of nums in R and the second is a ?? matrix/list/data.frame ?? of single ? entries? Can I transpose/transform it into one vector? Tried 'as.vector' but did not help. Eik Vettorazzi-2 wrote: > > sum(red>.5) > length(which(red>.5)) > Sorry for being unprecise. Yes, in this case it was mainly the sum (thanks! helpful function!), but in general I'd like to understand what happened with subset here... Eik Vettorazzi-2 wrote: > > > and the arr.ind option of which may be useful as well. > Thanks a lot, very helpful. For other newbies, here is the line: tableReduced[,-1][which(tableReduced[,-1]>0.5, arr.ind=TRUE)] I needed to exclude the first column (-1) since these were titles (factors) of my rows. In the first trial I forgot to add this information to the first notion of the table as well, i.e., I tried: tableReduced[which(tableReduced[,-1]>0.5, arr.ind=TRUE)] This will (of course, I have to admit) result in subsetting fields that are in one column to the left of the intended column. So, if there are any subsetting indices in the which-function, they also need to be put in front of it to make the indices match. Just for my understanding, do you know what R did with here? Where do the NA values come from, what is the row-title NA.1, why does it print the first two rows unchanged and then goes crazy? > subset(red[,], red[,] > 0.5) > Allstar hsa.let.7a hsa.let.7a.1 hsa.let.7a.2 > 2 0.87 0.79 -0.57 1.07 > 3 0.67 -1.14 -0.78 -0.95 > NA NA NA NA NA > NA.1 NA NA NA NA > NA.2 NA NA NA NA Thanks for this community with fast and reliable help. Amazing to see! -- View this message in context: http://r.789695.n4.nabble.com/subsetting-tables-tp3793509p3794527.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.
