[R-sig-eco] Neighbor sampling is random?

Kingsford Jones kingsfordjones at gmail.com
Sat Jul 4 18:55:57 CEST 2009


This may help a bit with intuition.  Think about randomly picking a
spot in the box below and then choosing the nearest neighbor.  What's
the inclusion probability for 1?  What about 6?  Clearly not a simple
random sample...


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|123       |
|456       |
|           |
|           |
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hth,

Kingsford Jones

2009/7/4 Paulo Inácio de Knegt López de Prado <prado at ib.usp.br>:
> Dear r-eco-list users,
>
> This is not an R-question, but a statistical one, but maybe somebody can help.
>
> I had read that to set random points over an area and picking the nearest
> plant is not random sample, but I could not recover this article.
>
> Is that correct? Could you provide some basic reference?
>
> Thanks a lot
>
> Paulo
>
> --
> Paulo Inácio de Knegt López de Prado
> Depto. de Ecologia - Instituto de Biociências - USP
> Rua do Matão, travessa 14, nº 321
> Cid. Universitária, São Paulo - SP
> CEP 05508-900
> 11-30917599 (sala)
> 11-30917600 (Secretaria)
>
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>



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