Can't you use sapply?
sapply(seq_len(10), function(i){SomeExpression(i)})
Best regards,
Thierry
> -----Oorspronkelijk bericht-----
> Van: [email protected] [mailto:[email protected]]
> Namens David Winsemius
> Verzonden: woensdag 10 augustus 2011 15:50
> Aan: Anthony Ching Ho Ng
> CC: [email protected]
> Onderwerp: Re: [R] rbind/cbind
>
>
> On Aug 10, 2011, at 9:08 AM, Anthony Ching Ho Ng wrote:
>
> > Dear list,
> >
> > I wonder if there a better way to have rbind/cbind/append to create
> > the first element (if it is empty) instead of doing the following in a
> > loop?
> >
> > for (i in 1:10) {
> > if (i == 1) {
> > aRow = SomeExpression(i)
> > } else {
> > aRow = rbind(aRow,SomeExpression(i)) } }
> >
>
> Generally one is advised not to use rbind in this manner but rather to pre-
> allocate aRow to the size needed and then to add information by rows using
> "[".
>
> For a matrix this might be:
>
> aRow <- matrix(NA, ncol=3, nrow=10)
>
> for (i in 1:10) {
> aRow[1,] <- SomeExpression(i)
> }
>
>
> --
> David Winsemius, MD
> West Hartford, CT
>
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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