Here is one way of doing it: > v1 [1] 1 1 NA NA 1 NA NA NA NA 1 1 1 NA 1 NA 1 NA NA 1 NA > v2 [1] NA 1 NA 1 1 1 1 1 NA 1 1 NA 1 1 NA NA NA 1 NA 1 > which(!(is.na(v1) | is.na(v2))) [1] 2 5 10 11 14 >
On 9/17/07, dxc13 <[EMAIL PROTECTED]> wrote: > > useR's > > I am trying to compare two vectors that have the same length. More > specifically, I am interested in comparing the corresponding positions of > each element in the vector. > > Consider these two vectors of length 20: > > v1 <- 2 2 4 NA NA NA 10 NA NA NA NA NA NA NA NA NA NA > NA NA NA > v2 <- NA 4 NA NA NA NA 10 NA NA NA NA NA NA NA NA NA NA > NA 100 NA > > I am only interested in extracting the position number where both vectors > are not equal to NA at the same position. > For example, the second element of both vectors is not equal to NA, and thus > I want to return '2'; similary, I also would want to have '7' returned > because the seventh element of both arrays is not equal to NA. > > In general, I would like to find a way to do this for any number of given > positions between the two vectors that satisfy this. If no positions > satisfy this, then return '0' > > I would like to store the results as an object. > > If anyone has any ideas, I would greatly appreciate it. Thanks! > > dxc13 > -- > View this message in context: > http://www.nabble.com/how-to-compare-2-numeric-vectors-tf4469582.html#a12743842 > 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? ______________________________________________ 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.
