For the first case, just extend the vector: > x<-c(3,4,5) > x [1] 3 4 5 > x[5] <- NA > x [1] 3 4 5 NA NA >
the second would use 'which' On Mon, Jul 7, 2008 at 5:07 PM, Eric Turkheimer <[EMAIL PROTECTED]> wrote: > I am wondering if it is possible to perform the following two basic > functions with primitive R functions. I know I could write functions for > either, but it seems as though they are probably built-in somewhere. > > 1) Fill out a vector to a desired length with missing values or zeros. So, > > x<-c(3,4,5) > f(x,5) > > 3,4,5,NA,NA > > 2) Find the [row,col] location of a particular value in a matrix, eg > > x<-matrix(1:9,ncol=3) > > f(x,2) > > 2,1 > > > Thanks. > > -- > Eric Turkheimer, PhD > Department of Psychology > University of Virginia > PO Box 400400 > Charlottesville, VA 22904-4400 > > http://www.people.virginia.edu/~ent3c > > 434-982-4732 > 434-982-4766 (FAX) > > [[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. > -- 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.
