[R] density function

[Hui Han]

Thank you so much, Suresh. I searched a lot on "density" among R email 
archives. Should have searched using "derivative".

Hui

Suresh Krishna wrote:

>
> 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.
>>>
>>
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>
>
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