frac_tree.m

matlab的大量实例代码

function [x,y]=frac_tree(x0,y0,v)
N=length(v);
x=[x0; zeros(N-1,1)]; y=[y0; zeros(N-1,1)];
for i=2:N
   vv=v(i);
   if vv<0.05, y(i)=0.5*y(i-1);
   elseif vv<0.45,
      x(i)=0.42*(x(i-1)-y(i-1)); y(i)=0.2+0.42*(x(i-1)+y(i-1));
   elseif vv<0.85,
      x(i)=0.42*(x(i-1)+y(i-1)); y(i)=0.2-0.42*(x(i-1)-y(i-1));
   else,
      x(i)=0.1*x(i-1); y(i)=0.1*y(i-1)+0.2;
   end
end