[R] rbind and data.frame

[Göran Broström]

On Wed, 5 Dec 2001, Göran Broström wrote:

[...]
 
> My real problem is how to create a data frame in a sequentially growing
> manner, when I know the final size (no of cases). I want to avoid to
> call 'rbind' many times, and instead create an 'empty' data frame in
> one call, and then fill it. Are there better ways of doing this?

Got no answer to this one, so I provide one myself:

The answer is: Yes, definitely. I did this, with pure  R  code, and 
created a new data frame with around 58000 records. It took 7 hours to 
run. I then did it with compiled code (Fortran), and that made a slight
difference:  It took 4.8 seconds(!).

Göran

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