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Dessan training with pencil.
on 12 Oct 2021
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a1 = -2.82;
a2 = 1.43;
a3 = -0.01;
a4 = -0.97;
s = 1E5;
d = zeros(3,s);
d(1,1) = 1;
d(2,1) = 1;
d(3,1) = 1;
for i = 2:s
d(1,i) = sin(a1*d(2,i-1)) + a3*cos(a1*d(1,i-1));
d(2,i) = sin(a2*d(1,i-1)) + a4*cos(a2*d(2,i-1));
d(3,i) = d(1,i) + d(2,i);
end
scatter(d(1,:),d(2,:),0.1,".k")
xlim([-2 2])
ylim([-2 2])