📄 frontispiece.m
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%figure(1)%colormap(flipud(gray))%q = double(imread('ngc6543a.jpg')); %qq = 0.3*q(:,:,1) + 0.59*q(:,:,2) + 0.11*q(:,:,3);%clf%imagesc(qq(1:550,1:598))%axis image off%hold on%ax = axis;%plot([ax(1) ax(2) ax(2) ax(1) ax(1)],...% [ax(3) ax(3) ax(4) ax(4) ax(3)])% %figure(2)%clf%colormap(gray(256))%q = double(imread('ambass.jpg'));%qq = 0.3*q(:,:,1) + 0.59*q(:,:,2) + 0.11*q(:,:,3);%clf%imagesc(qq)%brighten(0.6)%axis image off%hold on%ax = axis;%plot([ax(1) ax(2) ax(2) ax(1) ax(1)],...% [ax(3) ax(3) ax(4) ax(4) ax(3)])% figure(3)clft = linspace(0,2*pi,200);x = (10 - t).*cos(4.3*t);y = (10 - t).*sin(4.3*t);z = 1+t;surf(x'*[1 1],y'*[1 1],z'*[0 1],z'*[1 1])colormap(range(gray,.5,.9))hold onaxis tightax = axis;plot([ax(1) ax(2) ax(2) ax(1) ax(1)],... [ax(3) ax(3) ax(4) ax(4) ax(3)])view([24 65])axis off
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