Wie kann ich beim iterativen Plot / Feigenbaumdiagramm einen Spy ergänzen?
Graph von [hier][1]
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Geht das? Leider scheitern meine Versuche.
![alt text][1]
text][2]
![alt text][2]
text][3]
% arara: lualatex
\author{stefan_k}
\documentclass[border=10pt]{standalone}
\usepackage{pgfplots}
\usetikzlibrary{spy}
\usepackage{luacode}
\begin{luacode*}
function logistic()
local function map(r,x)
return r*x*(1-x)
end
for r = 2.5,4,0.005 do
x = 0.1
for i = 1, 200 do
x = map(r,x)
end
for i = 1, 250 do
x = map(r,x)
tex.sprint("("..r..","..x..")")
end
end
end
\end{luacode*}
\begin{document}
\begin{tikzpicture}[spy using outlines={rectangle, red, magnification=5,
size=1.5cm, connect spies}]
\begin{axis}[tick label style={font=\tiny}, axis lines=middle]
\edef\logisticplot{\noexpand\addplot [color=black!10, mesh, only marks,
mark size = 0.05pt, opacity = 0.1] coordinates{ \directlua{logistic()} };}
\logisticplot
\draw[blue] (axis cs: 0,0) -- (axis cs: 2,0.5);
\end{axis}
%
% Problem:
%
%\spy [blue, size=0.5cm] on (axis cs: 3.55,.5) in node [right] at (0,-5.25);
%
%
%
\end{tikzpicture}
\end{document}
[1]: http://texwelt.de/wissen/fragen/7097/wie-kann-man-einen-iterativen-plot-eleganter-schreiben
[2]: http://texwelt.de/wissen/upfiles/Namenlos-11e4yyy_30.png
[2]: [3]: http://texwelt.de/wissen/upfiles/55555555_8.png
