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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