[R] proportional sampling

[jim holtman]

sample(df$ID, numOfTime, replace=TRUE, prob=df$Factor)

On 4/27/07, tibi.codilean at ges.gla.ac.uk <tibi.codilean at ges.gla.ac.uk> wrote:
> Dear All,
>
> I wonder if you could help me.
>
> I have a table with a series of sites that I would like to sample from.
> The table has 5 columns:
>
> ID
> X Coordinate
> Y Coordinate
> Value
> Factor
>
>
> The conditions are that each site can be selected more than once and the
> probability of it being selected (or sampled) is proportional to a factor
> located in column 'Factor'
>
> I am novice in terms of R, and am not entirely sure how to do the
> proportional sampling.
>
> Any help would be appreciated
> Thanks
> Tibi
>
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>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem you are trying to solve?