Re: [R] randomForest outlier

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Wed, 16 Jul 2008 08:11:15 -0400

Perhaps if you follow the posting guide more closely, you might get more (useful) replies, but without looking at your data, I doubt there's much anyone can do for you.

The fact that the range of the outlying measures is -1 to 2 would tell me there are no potential outliers by this measure. Please see the "value" section of ?outlier to see how this measure is computed.

Andy

From: Birgitle
>
> Still the same question:
>
>
> Birgitle wrote:
> >
> > I try to use ?randomForest to find variables that are the
> most important
> > to divide my dataset (continuous, categorical variables) in
> two given
> > groups.
> >
> > But when I plot the outlier:
> >
> > plot(outlier(rfObject, cls=groupingVariable),
> > type="p",col=c("red","green")[as.numeric(groupingVariable)])
> >
> > it seems to me that all my values appear as outliers.
> > Has anybody suggestions what is going wrong in my analysis?
> >
> >
> >
> >
>
> Additonal remark
> The scaling of the y-axis is quite small between -1 and 2.
>
>
> -----
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