[R] Drawing from an empirical distribution

Albyn Jones jones at reed.edu
Tue Jan 6 23:55:54 CET 2009


the empirical distribution gives probability 1/n to each of n observations.
rather than sampling the unit interval, just resample the dataset.
If x is your dataset, and you want an independent sample of size k,

        sample(x,size=k,replace=TRUE)

albyn

On Tue, Jan 06, 2009 at 02:39:17PM -0800, culpritNr1 wrote:
> 
> Hi All,
> 
> Does anybody know if there is a simple way to draw numbers from an empirical
> distribution?
> 
> I know that I can plot the empirical cumulative distribution function this
> easy:
> plot(ecdf(x))
> 
> Now I want to pick a number between 0 and 1 and go back to domain of x.
> Sounds simple to me.
> 
> Any suggestion?
> 
> Thank you,
> 
> Your culprit
> (everybody needs a culprit)
> 
> 
> -- 
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> 
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