I have a list that starts out like: r <- list() r[[3]] <- list(count=1, orderlist=data.frame(count=1, sku="A"))
So r[3] yeilds: [[1]] [[1]]$count [1] 1 [[1]]$orderlist count sku 1 1 A So far so good. Now I want to detect the fact that there is no etry in 1,2, and 4. > r[1] [[1]] NULL > is.null(r[1]) [1] FALSE So how do I detect the NULL at r[1]? Thank you. Kevin ______________________________________________ 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.
