On Saturday 24 May 2008 00:11, you wrote:
> On Sat, 24 May 2008 01:15:37 +0200, Philipp K. Janert <
janert@...>
>
> wrote:
> > I just submitted a patch (1970923) which
> > draws a smooth histogram-like curve
> > for a random collection of points, using
> > a Gaussian kernel density estimation
> > algorithm.
> > Demos are found here:
> > www.philipp-janert.com/kdensity
>
> very interesting.
>
> My initial impression on looking at your top left example is that there is
> a phase shift of +half a box in x most visible in the 0.01 and 0.05 plots.
>
The edge effect is actually in the histogram,
not in the kernel density (yet another advantage
of k-densities over histograms: the annoying
bin-placement problem goes away).
The code does what all current gnuplot
smoothing algos do: they stop at the min
and max data point in the sample. I think
this is reasonable.
Best,
Ph.
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