[R] Sum(Random Numbers)=100

[Peter Dalgaard]

Richard Pearson wrote:
> Shubha
>
> Does table(ceiling(runif(100,0,50))) give you something like you want?
That's a neat(-ish) solution of Moshe's multinomial formulation.

More generally, if p is a vector of probabilities you can simulate 
independent indicators with cut(runif(N), c(0,cumsum(p)) and then 
multinomials by tabulation.

However, it is inefficient for large N, and awkward if you want 
replicates, which is why we have rmultinom(). In the present case use 
rmultinom(1, 100, rep(1/50,50))

-- 
   O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
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