The original description page was here. All following user names refer to en.wikipedia.
This image shows scatterplots (in this case, phase diagrams) for the chaotic logistic map with parameter r = 4. This is the large version; there is also a small version for including on pages.
This image was originally created by me (Ben Cairns) on 20 June, 2002, in encapsulated postscript (color level 2) from a MATLAB figure source, constructed using code that I wrote for an honours subject on chaos and time series. I am in the process of porting the code to construct this figure to GNU Octave, and will post it here when it is done.