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Love MATLAB T-shirt!!
on 11 Oct 2021
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s=0:0.1:pi;t=0:0.1:2*pi;r=s/pi;
a=abs(sin(t));
b=abs(sin(s));
f=1./r;
subplot(161);plot(t,a);axis square
subplot(162);plot(s,b);axis square;
subplot(163);plot([-s,s],-.1*[f,f]);axis square;
subplot(164);plot(r,f);axis square;
subplot(165);plot(s,b);axis square;
subplot(166);plot(a,t);axis square;