[R] for loop

[Michael Bedward]

I've been caught out by this more times than I care to admit -
forgetting that an R for loop isn't a C for loop.

Here's one solution...

k <- start.value
while (k <= end.value) {
  # do stuff
  k <- k + 1
}

Michael

On 11 September 2010 18:39, Yuan Jian <jayuan2008 at yahoo.com> wrote:
> Hello,
> I have a simple question: I want to list numbers 1:k, but if k <1, I hope nothing listed.
> how should we do?
> k=2
> for (i in 1:k)  print(i)
> [1] 1    # <-correct
> [1] 2
> k=0
> for (i in 1:k) print(i)
> [1] 1      #<---- wrong
> [1] 0
>
>
>
> thanks
> jian
>
>
>
>
>
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