MATLAB IFS 分形算法

function IFS_draw(M,p) N=30000;  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,'k.', 'MarkerFaceColor','k','markersize',2);  axis equal;   clc;clear;close all; M=[0.06,0,0,0.6,0,0;...         0.04,0,0,-0.5,0,1;...         0.46,-0.34,0.32,0.38,0,0.6;...         0.48,0.17,-0.15,0.42,0,1;...         0.43,-0.26,0.27,0.48,0,1;...         0.42,0.35,-0.36,0.31,0,0.8];  p=[0.1,0.1,0.1,0.23,0.23,0.24];  IFS_draw(M,p);  axis image;  set(gcf,'Color','w');