[R] Excluding data in R

[Petr Pikal]

On 3 Oct 2004 at 13:56, Laura Collins wrote:

> I was hoping someone could help me!
> 
> 
> 
> How do you exclude outliers from a set of data?  

It depends strongly on your definition of outliers. You can apply 
some rules of thumb (e.g. points more than 3 sd apart) but it is 
quite often questionable. (see discussion few days ago).

If you already identified your outliers use

my.data[-outliers.points] in case of vector or
my.data[-outliers.points,] in case of data frame or matrix.

Cheers
Petr


> 
> 
> 
> Thanks,
> 
> 
> 
> Laura
> 
> 
>  [[alternative HTML version deleted]]
> 
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Petr Pikal
petr.pikal at precheza.cz