density plot

[yuniyuni21 at gmail.com]

Hi,

Does anyone know how to make the density plot, more specifically a
gaussian-smoothed version of a histogram.  Actually, it's not exactly
a plot that I want.  What I want to do is get the maximum count (or
highest peak) of the density distribution.  It's different from the
probability density function that has the center at zero.

In S plus and R, there is the "density" function which I can use to
get the max x and  y in the frequency distribution.

I really appreciate if anyone can help.