[R] density function

[Suresh Krishna]

http://finzi.psych.upenn.edu/R/Rhelp02a/archive/20509.html

-s.

Hui Han wrote:
> 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.
>>
> 
> ______________________________________________
> R-help at 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
>