Duncan Murdoch wrote: > Shruthi Jayaram wrote: >> Hi, >> >> How do I check for two conditions in an if loop? I want to check if a >> value >> lies between 2 other values. >> > "if" isn't normally a loop, but what you want is the vectorized > version, the ifelse() function. >> For example, >> A <- ts(rnorm(120), freq=12, start=c(1992,8)) >> X <- 0.5 >> Y <- 0.8 >> >> I would like to create a new vector C for which C[i] is 0 if A[i] >> lies in >> between X and Y. > > C <- ifelse( X < A & A < Y, 0, A)
or using Petr's hint: C <- (A<X|A>Y)*A which seems much faster on substantial inputs. pay attention to whether your 'in between' is inclusive or not; the two versions above are not equivalent. vQ ______________________________________________ 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.
