Dear ALL,
Does anyone know how to get code program for a build-in in R, e.g. when I tape mean, I get the following: 
 mean
function (x, ...) 
UseMethod("mean")
<environment: namespace:base>

On the other hand, does anyone know how to maximise a density function in R (density) to get extremum (x* and f(x*)).

Thank in advance,

Alphonse.




      
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