Matalab IFS分形算法

function IFS_draw(M,p)
N=300000; 
for k=1:length(p);
    eval([‘a‘,num2str(k),‘=reshape(M(‘,num2str(k),‘,:),2,3);‘]);
end
xy=zeros(2,N); 
pp=meshgrid(p); 
pp=tril(pp); 
pp=sum(pp,2); 
for k=1:N-1;
    a=rand-pp; 
d=find(a<=0);
    xy(:,k+1)=eval([‘a‘,num2str(d(1)),‘(:,1:2)‘])*xy(:,k)+eval([‘a‘,num2str(d(1)),‘(:,3)‘]); 
end;
P=complex(xy(1,:),xy(2,:)); 
plot(P,‘y.‘, ‘MarkerFaceColor‘,‘y‘,‘markersize‘,2); 
axis equal; 
axis image;
axis off;
set(gcf,‘Color‘,‘k‘);

% M, p 数据已经存为文件 IFS_Mp.mat 
load(‘IFS_Mp.mat‘);
IFS_draw(M,p);