?rbinom
only says:
size: number of trials (zero or more).
prob: probability of success on each trial.
But they can be vectors.
BTW, you were aked to "PLEASE ... provide minimal, self-contained,
reproducible code."
What you show cannot run without correction.
Most likely, you intended size(n) to be the n-th element of the vector
'size', which in R is written 'size[ n ]' .
In which case
sum (rbinom( length(prob) , size, prob ) )
works.
Chuck
On Tue, 23 Oct 2007, Rainer M Krug wrote:
> Hi
>
> I have two vectors, prob and size, and I want to add the random deviates
> of these two, i.e.
>
> sum(
> sapply(
> 1:length(prob),
> function(n){ rbinom(1, size(n), prob(n) }
> )
> )
>
> My problem is that I have to do this for a large number of value
> combinations. Is there a faster way of doing this?
>
> Rainer
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
Charles C. Berry (858) 534-2098
Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu UC San Diego
http://famprevmed.ucsd.edu/faculty/cberry/ La Jolla, San Diego 92093-0901