plot(x,y1,x,y2)
title('x from 0 to 2{\\pi}');%加图形标题 xlabel('Variable X'); ylabel('Variable Y');
text(0.8,1.5,'y1=2e^{-0.5x}'); text(2.5,1.1,'y2=cos(4{\\pi}x)'); legend('y1',' y2') t=0:pi/50:2*pi; p=sin(t).*cos(t); polar(t,p,'-*');
(5)
(6)
[x,y]=meshgrid(0:0.25:4*pi); z=sin(x+sin(y))-x/10; mesh(x,y,z);
axis([0 4*pi 0 4*pi -2.5 1]);
(7) [x,y]=meshgrid(-8:0.5:8); z=sin(sqrt(x.^2+y.^2))./sqrt(x.^2+y.^2+eps);
subplot(2,2,1); mesh(x,y,z);
(8)x = -pi:pi/100:pi;y=(sin(1./x)).*x;plot(x,y) (9) t=0:pi/100:6*pi;
x = 3*(t-sin(t)); plot(t,x) hold on
y=3*(1-cos(t)); plot(t,y);
hold off
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