[R] how does while work
Greg Snow
snow at fisher.byu.edu
Thu Mar 21 16:22:26 CET 2002
On Wed, 20 Mar 2002, jimi adams wrote:
> i am having some problems with a program that i am writing and i think that
> knowing how the while command works will help me to figure out where i am
> going wrong
> *when do you get kicked out of a while loop?*
> (i.e., in the following example what would the final value of 'a' be?) i
> thought it would be 99 but running it in R i get 101 (and 101 for x too!)
>
> while (x <100) {
> for (i in 1:101) {
> i -> x
> x -> a
> }
> }
If you are trying to jump out of a for loop early then try something like:
for (i in 1:101) {
i -> x
if (! x<100 ) { break }
x -> a
}
the "next" command will also skip the rest of the body of the loop and
start on the next iteration.
Hope this helps,
--
Greg Snow, PhD Office: 223A TMCB
Department of Statistics Phone: (801) 378-7049
Brigham Young University Dept.: (801) 378-4505
Provo, UT 84602 email: gls at byu.edu
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