I am aware of easily drawing a spiral in the note of nonlinear dynamics. Here are some examples:
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11-1: No research effort.– Werner ♦Mar 13, 2014 at 6:10
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3Welcome to TeX.SX. Questions about how to draw specific graphics that just post an image of the desired result are really not reasonable questions to ask on the site. Please post a minimal compilable document showing that you've tried to produce the image and then people will be happy to help you with any specific problems you may have. See minimal working example (MWE) for what needs to go into such a document.– HoleneMar 13, 2014 at 6:21
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1the above is just a statement…not a question!– LeeserMar 13, 2014 at 14:09
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1 Answer
You can use TikZ. Here is an example:
But I never used it before, so maybe there is a better method than gluing arrows together, here is the code:
\documentclass{standalone}
\usepackage{tikz}
\usepackage{pgfplots}
\pgfplotsset{width=6cm,compat=newest}
%for arrows in the middle of the line
\usetikzlibrary{decorations.markings}
\tikzset{->-/.style={decoration={
markings,
mark=at position #1 with {\arrow{>}}},postaction={decorate}}}
\begin{document}
\begin{tikzpicture}
%straight lines
\draw[->-=.4] (0,0) to (-1,0);
\draw[->-=.6] (0,-1) to (0,0);
%arcs on the left
\draw[->-=.5] (-0.3,1) to [out=-90,in=0] (-1,0.3);
\draw[->-=.5] (-0.3,-1) to [out=90,in=0] (-1,-0.3);
%big circle from the bottom to the top
\draw[->-=.5] (0.3,-1) to [out=90,in=200] (0.8,-0.3);
\draw (0.8,-0.3) to [out=20, in =-90] (1.5,0.5) to [out=90, in=0] (0.7,1.3) to [out=180,in=90] (0,0.5);
\draw[->-=.2] (0,0.5) to (0,0);
%inward spiral
\draw[->-=.8] (0,0) to (0.5,0);
\draw[->] (0.5,0) to [out=0, in=-90] (1.1,0.5) to [out=90, in=0] (0.7,0.9) to [out=180, in=90] (0.4,0.6) to [out=-90, in=180] (0.6,0.4) to [out=0,in=-90] (0.75,0.6);
\end{tikzpicture}
\end{document}
Check you the very minimal introduction to TikZ. In order to get the arrows in the middle of a line, I googled "tikz arrows in the middle of line".
