Re: [R] using kernel density estimates to infer mode of distribut ion

From: Liaw, Andy <andy_liaw_at_merck.com>
Date: Fri 17 Feb 2006 - 00:10:46 EST


This might be of interest:
http://math.usu.edu/~minnotte/research/software/modetree.r (I was not able to get to the link, but google has a cached version.)

Prof. Marron's SiZer maps may also be of interest, but AFAIK the code is in Matlab only.

Andy

From: Dan Rabosky
>
>
> Hello...
>
> Is it possible to use "density" or another kernel density
> estimator to
> identify the mode of a distribution? When I use 'density',
> the resulting
> density plot of my data is much cleaner than the original
> noisy histogram,
> and I can clearly see the signal that I am interested in.
> E.g., suppose my
> data is actually drawn from two or more normal (or other)
> distributions. Looking at the kernel density plots, it seems
> that the
> estimator gives a good approximation of the modal values of each
> distribution, but I can't figure out how to obtain these
> values short of
> visually estimating the location of the mode using the plot(density).
>
> Is there a relatively easy way to do this?
>
> Thanks in advance for your help!
> Dan Rabosky
>
>
>
> Dan Rabosky
> Department of Ecology and Evolutionary Biology
> Cornell University
> Ithaca, NY14853-2701 USA
> web: http://www.birds.cornell.edu/evb/Graduates_Dan.htm
>
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>



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri Feb 17 00:15:54 2006

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