It is difficult to know what you're trying to do here, I think. Is this it? You almost surely don't need a for loop to accomplish your task, and should make use of the pre-existing vectorized functions provided to you.
a <- c(4, 5, 1, 7, 8, 12, 39) b <- c(3, 7, 8, 4, 7, 25, 78) d <- a - b which(d > 0) Erik -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Edward Chen Sent: Monday, September 14, 2009 1:50 PM To: r-help@r-project.org Subject: [R] Help with for loop I have a code: *a = c(4,5,1,7,8,12,39) b = c(3,7,8,4,7,25,78) d =a-b for(i in 1:length(d)){ if(d[i]>0){x = list(d[i]) print(x)} else{y = list(d[i]) print(y)}} the results are: [[1]] [1] 1 [[1]] [1] -2 [[1]] [1] -7 [[1]] [1] 3 [[1]] [1] 1 [[1]] [1] -13 [[1]] [1] -39 which will tell me what d is. but is it possible to output the order in which the difference is in the vector d? for example I would want to see x = 1,3,1 and they are from d[1], d[4], d[5]. This is just a crude example I thought of to help me do something more complicated. Thank you very much! * -- Edward Chen Email: edche...@gmail.com Cell Phone: 510-371-4717 [[alternative HTML version deleted]] ______________________________________________ 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. ______________________________________________ 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.
