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on 19 Nov 2023
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drawframe(48);
Write your drawframe function below
function drawframe(f)
% function from [Hamid Naderi Yeganeh] : https://www.ams.org/publicoutreach/math-imagery/yeganeh
K=1:min(870*f,4e4);
t=linspace(0,2*pi,200);
X=@(k) 3./2.*cos(141.*pi.*k./4e4).^9.*(1-1./2.*sin(pi.*k./4e4)).*(1-1./4.*cos(2.*pi.*k./4e4).^30.*(1+cos(32.*pi.*k./4e4).^20)).*...
(1-1./2.*sin(2.*pi.*k./4e4).^30.*sin(6.*pi.*k./4e4).^10.*(1./2+1./2.*sin(18.*pi.*k./4e4).^20));
Y=@(k) cos(2.*pi.*k./4e4).*cos(141.*pi.*k./4e4).^2.*(1+1./4.*cos(pi.*k./4e4).^24.*cos(3.*pi.*k./4e4).^24.*cos(21.*pi.*k./4e4).^24);
R=@(k) 1./100+1./40.*(cos(141.*pi.*k./4e4).^14+sin(141.*pi.*k./4e4).^6).*(1-cos(pi.*k./4e4).^16.*cos(3.*pi.*k./4e4).^16.*cos(12.*pi.*k./4e4).^16);
CX=[X(K')+cos(t).*R(K'),K'.*nan]';
CY=[Y(K')+sin(t).*R(K'),K'.*nan]';
plot(CX(:),CY(:),'Color',[0,0,0,.02]);
set(gca,'DataAspectRatio',[1,1,1],'XColor','none','YColor','none','XLim',[-1.5 1.5],'YLim',[-1.5 1.5]);
end
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