[R] How to do a probability density based filtering in 2D?

[David Winsemius]

On Nov 19, 2010, at 8:44 PM, Emmanuel Levy wrote:

> Hello,
>
> This sounds like a problem to which many solutions should exist, but I
> did not manage to find one.
>
> Basically, given a list of datapoints, I'd like to keep those within
> the X% percentile highest density.
> That would be equivalent to retain only points within a given line of
> a contour plot.
>
> Thanks to anybody who could let me know which function I could use!

What's wrong with quantile?

-- 
David Winsemius, MD
West Hartford, CT