Re: [R] density function

From: Hui Han <huihan_at_yahoo-inc.com>
Date: Wed 11 May 2005 - 16:02:02 EST

Thank you very much, Professor Ripley.

If possible, could you point me to other packages that you think I should look at for estimating a derivative?

Best regards,
Hui

Prof Brian Ripley wrote:

> On Tue, 10 May 2005, Hui Han wrote:
>
>> I wonder if the function "density" outputs the gaussian mixture
>> formula that is estimated from the input data, assuming a gaussian
>> model is used at each data point ? I want to take the derivative of
>> the finally estimated gaussian mixture formula for further analysis.
>
>
> It is a kernel density estimate: a rather trivial mixture, not
> necessarily Gaussian. Also, it is not set up to optimally estimate a
> derivative, and you should look at more sophisticated methods in other
> packages if you want to do that.
>
> As to what "density" outputs: see its help page.
>



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