[R] How to use density function to find h_{k}

[Roger Koenker]

You might try:  http://www.stanford.edu/~kasparr/software/silverman.r

But  take a look at the referenced paper by Silverman first.  You could 
also try the CRAN package ftnonpar by Kovac and Davies.


url:	www.econ.uiuc.edu/~roger/my.html	Roger Koenker
email	rkoenker at uiuc.edu			Department of Economics
vox: 	217-333-4558				University of Illinois
fax:   	217-244-6678				Champaign, IL 61820

On Sun, 3 Jun 2007, Patrick Wang wrote:

> Hi, All:
>
> How can I use the density function to find the minimum of the bandwidth
> make the density function one mode, 2 mode, 3 mode etc. usually the
> larger the bandwidth, the fewer mode of the density. less bumpy.
>
> It will be impossible to try all possible bandwidths to then plot the pdf
> to see how many modes it has. Is there an automatic way to do this Like
> for loop 1000, try bandwidth from (0, 1). is there a function to get
> how many modes from the density function? the Mode function in R doesnot
> seem to serve this purpose.
>
>
> Thanks
> pat
>
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