On Thu, 2005-10-20 at 11:34 +0200, Martin Maechler wrote: > >>>>> "Marc" == Marc Schwartz <[EMAIL PROTECTED]> > >>>>> on Wed, 19 Oct 2005 20:28:05 -0500 writes: > ............. > > >> > In reviewing the Green Book on the top of page 143, it shows an > example > >> > in which the RHS of the assignment are the indices into the LHS > object > >> > which are to be set to NA. For example: > >> > > >> > > xx <- c(0:5) > >> > > >> > > xx > >> > [1] 0 1 2 3 4 5 > >> > > >> > > is.na(xx) <- c(3, 4) > >> > > >> > > xx > >> > [1] 0 1 NA NA 4 5 > >> > > >> > > > ........... > > Marc> In all honesty, while I understood the concept from reading the help > Marc> page, it was not truly clear until I read the Green Book and saw the > Marc> example as to how to actually use the function. > > Marc> It would probably be worthwhile to add an example of use to the help > Marc> page. > > good idea. I've added a version of yours: > > (xx <- c(0:4)) > is.na(xx) <- c(2, 4) > xx #> 0 NA 2 NA 4 > > Martin
Great! Thanks Martin! Marc ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
