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File:Fractal fern-Barnsley animation.gif

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Description
Polski: Animacja obrazująca działanie algorytmu IFS generującego paproć Barnsleya dla różnej liczby powtórzeń
Date 1 January 2008 (original upload date)
Source Transferred from pl.wikipedia to Commons by Masur using CommonsHelper.
Author Gknor at Polish Wikipedia

Licensing

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Public domain This work has been released into the public domain by its author, Gknor at Polish Wikipedia. This applies worldwide.
In some countries this may not be legally possible; if so:
Gknor grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

Przykładowy programy (Matlab)

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Program napisany w Matlabie generujący paproć widoczną na animacji obok: 

for max_step=[1000 10000 50000  100000  500000];
    x=zeros(1,max_step);
    y=zeros(1,max_step);
    for n=1:max_step
        r=rand();
        if r<=0.01
            x(n+1)=0;
            y(n+1)=0.16*y(n);
        elseif r<=0.08
            x(n+1)=0.2*x(n)-0.26*y(n);
            y(n+1)=0.23*x(n)+0.22*y(n)+1.6;
        elseif r<=0.15
            x(n+1)=-0.15*x(n)+0.28*y(n);
            y(n+1)=0.26*x(n)+0.24*y(n)+0.44;
        else
            x(n+1)=0.85*x(n)+0.04*y(n);
            y(n+1)=-0.04*x(n)+ 0.85*y(n)+1.6;
        end
    end
    plot(x,y,'.','Color', 'g', 'MarkerSize',1)
    title(['N = ' num2str(max_step)])
    drawnow
    pause(0.5)
end

Original upload log

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The original description page was here. All following user names refer to pl.wikipedia.
  • 2008-01-01 20:37 Gknor 828×573× (85768 bytes) {{Grafika | Opis = animacja obrazująca działanie algorytmu IFS generującego paproć Barnsleya dla różnej liczby powtórzeń | Źródło = praca własna | Data = 1-I-2008 | Autor = Grzegorz Knor |Warunki udostępnienia = patrz niżej }}

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current09:04, 27 December 2009Thumbnail for version as of 09:04, 27 December 2009828 × 573 (84 KB)File Upload Bot (Magnus Manske) (talk | contribs) {{BotMoveToCommons|pl.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{pl|== Licencja ==}} |Source=Transferred from [http://pl.wikipedia.org pl.wikipedia]; transferred to Common

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