On 11/2/05, Pascal A. Niklaus <[EMAIL PROTECTED]> wrote:
> Hi all,
>
> I would like to aggregate a large data file that is defined by a number of
> factors and associated values. The point is that not all factor level
> combinations are present in the data file -- these "missing" values are in
> f
Hi all,
I would like to aggregate a large data file that is defined by a number of
factors and associated values. The point is that not all factor level
combinations are present in the data file -- these "missing" values are in
fact to be treated as zeroes.
Is there a straightforward way to
