[R] Contour plot (level curves)

[Prof Brian Ripley]

On Thu, 4 Oct 2007, Caio Azevedo wrote:

> Hi all,
>
> I have a sample of n values from a bivariate distribution (from a MCMC
> procedure). How could I draw a contour plot of "the joint density" based on
> that sample ?

You need to estimate the density, and contour that estimate.  MASS has 
examples using its kde2d function.  There are other methods available, 
e.g. in package sm.

>
> Sorry if I was not too clear.
>
> Thans in advance,
>
> Regards,
>
> Caio
>
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>
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-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
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