Groups > comp.graphics.apps.gnuplot > #1923

Re: smooth kdensity

From	sfeam <sfeam@users.sourceforge.net>
Newsgroups	comp.graphics.apps.gnuplot
Subject	Re: smooth kdensity
Followup-To	comp.graphics.apps.gnuplot
Date	2013-06-28 12:09 -0700
Organization	gnuplot development team
Message-ID	<kqkmmi$f85$1@dont-email.me> (permalink)
References	(2 earlier) <kpvnh2$d9e$1@news.rz.uni-karlsruhe.de> <kq2s05$gc0$1@dont-email.me> <kq4jm9$bop$1@news.rz.uni-karlsruhe.de> <kq4uo0$r6g$1@dont-email.me> <kq8o0b$4c1$1@news.rz.uni-karlsruhe.de>

Followups directed to: comp.graphics.apps.gnuplot

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Karl wrote:

> I still say that it might be useful for some applications to give an
> individual bandwidth to each point. Isn´t there another way to resolve
> the disambiguity with the "with boxes" style? Or could it just be kept
> as it was, with proper documentation?

> Btw., have you checked if the routine indeed disregards the weights for
> calculating the average and deviation? That a bug?

Weights are not used in calculating the mean or standard deviation.
A related issue is still open on the tracker at 
  https://sourceforge.net/p/gnuplot/bugs/1118/
Should the calculations use sigma or e.s.d.?  (sum/N or sum/(N+1))

The kdensity code was originally contributed by Philipp Janert. 
I would be happy to get patches or requests for specific changes,
but it would be nice if they were accompanied by pointers to 
relevant literature or standard texts justifying the request.

	Ethan

> Best, Karl

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Thread

smooth kdensity Karl <mail.kfr@gmx.net> - 2013-06-20 15:05 +0200
  Re: smooth kdensity sfeam <sfeam@users.sourceforge.net> - 2013-06-20 08:28 -0700
    Re: smooth kdensity Karl <mail.kfr@gmx.net> - 2013-06-20 20:09 +0200
      Re: smooth kdensity sfeam <sfeam@users.sourceforge.net> - 2013-06-21 17:48 -0700
        Re: smooth kdensity Karl <mail.kfr@gmx.net> - 2013-06-22 16:34 +0200
          Re: smooth kdensity sfeam <sfeam@users.sourceforge.net> - 2013-06-22 12:48 -0700
            Re: smooth kdensity Karl <mail.kfr@gmx.net> - 2013-06-24 06:12 +0200
              Re: smooth kdensity sfeam <sfeam@users.sourceforge.net> - 2013-06-28 12:09 -0700

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