Your questions are confusing because you don't seem to understand R's basic data structures and manipulations. Please read the "Introduction to R" manual and appropriate portions of the R languuage definition before posting.
-- Bert Gunter Genentech Non-Clinical Statistics South San Francisco, CA "The business of the statistician is to catalyze the scientific learning process." - George E. P. Box > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] > Sent: Friday, May 06, 2005 8:08 AM > To: r-help@stat.math.ethz.ch > Subject: [R] 2 simple questions > > Please excuse what I'm sure are very easy questions but I'm > relatively new > to the R environment. > How can I view a range of list elements, but not all. e.g., > I had a matrix > of patients and then split them out by patient id. I know I can do > patlist[[1]] to see the first one, but how can I view, say, > the first ten > patients? > > My other question is how to count how many patients have a > record in which > a certain condition holds. E.g., I was trying something like > this to get a > count: > ctr<-0 > temp<-lapply(mylist, function(x){is.na(x$date1[1]) & > !is.na(x$date2[1])) > ctr<-ctr+1}) > > But I don't think that's working correctly. > > Thanks, > Steven > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
