[R] Using seq_len() vs 1:n

[Duncan Murdoch]

On 11/02/2010 3:39 PM, Peter Ehlers wrote:
> R-people,
>
> Duncan Murdoch's response in
>
>   https://stat.ethz.ch/pipermail/r-help/2010-February/227869.html
>
> reminded me of something I had been meaning to ask.
>
> A while ago I started using
>
>   for(i in seq_len(v)) {....}
>
> in preference to
>
>   for(i in 1:n) {....}
>
> Duncan's post shows that if n can be zero, there is
> an advantage to using seq_len.
> Is there ever a *dis*advantage?

I like to use 1:n when I'm teaching debugging, because it looks so safe 
but isn't.

Duncan Murdoch