## these functions assume the argument is integer odd <- function(x) x%%2 != 0
even <- function(x) x%%2 == 0 evenb <- function(x) !odd(x) odd(1:10) even(1:10) evenb(1:10) On Mon, Jul 21, 2014 at 4:33 PM, carol white <wht_...@yahoo.com> wrote: > Might be a trivial question but how to identify the odd and even indices of a > vector? > > x = c(1,z,w,2,6,7) > > el of odd indices= 1,w,6 > el of even indices= z,2,7 > > given the def of odd and even in > https://stat.ethz.ch/pipermail/r-help/2010-July/244299.html > > should a loop be used? > > for (i in 1: length(x)) > if (is.odd(i)) print (i) > > > Carol > > [[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. ______________________________________________ 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.
