[R] function for grouping

[Jeff Newmiller]

You will run out of memory. 2*3^198 is about 5e95 rows and 4GB of RAM can probably only hold about 5e8 rows.
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yan <y.jiao at ucl.ac.uk> wrote:

>thanks petr,
>what if I got 200 elements, so I have to write expand.grid(x1=1,
>x2=1:2,
>x3=1:3, x4=1:3, x5=1:3....x200=1:3))?
>
>Many thanks
>
>yan
>
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