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on 4 Oct 2021
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N=10^6;
v=zeros(N,2);
a=3;
t=linspace(pi/2,2*pi+pi/2,a+1);
c=[cos(t);sin(t)]';
p=[0,0];
lc=1;
for i=1:N
idx=randi(a);
lc=idx;
s=c(idx,:);
p=(p+s)/2;
v(i,:)=p;
end
plot(v(:,1),v(:,2),'.k',markersize=1)
xlim([-1,1])
ylim([-1,1])
axis off
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