次曲面.doc

二次曲面 隐函数 ezplot(y-sin(x)*cos(y)) %绘制y=sin(x)*cos(y)的图像 螺旋线： a=0:0.1:20*pi; h=plot3(a.*cos(a),a.*sin(a),2.*a,b,linewidth,2); axis([-50,50,-50,50,0,150]); grid on set(h,erasemode,none,markersize,22) 动态螺旋图 t=0:0.1:10*pi; i=1; h=plot3(sin(t(i)),cos(t(i)),t(i),*,erasemode,none); grid on axis([-2 2 -2 2 0 35]) for i=2:length(t) set(h,xdata,sin(t(i)),ydata,cos(t(i)),zdata,t(i)); drawnow pause(0.01) end title(?ˉì??YDyí?); 圆柱螺旋线 t=0:0.1:10*pi; r=3; x=r.*cos(t); y=r.*sin(t); z=t; plot3(x,y,z,h,linewidth,2); grid on axis(square) xlabel(x?á); ylabel(y?á); zlabel(z?á); title(?2?ù?YDy??) X^2+Y^2/4 双叶双曲面 ezsurf(8*tan(u)*cos(v),8.*tan(u)*sin(v),2.*sec(u),[-pi./2,3*pi./2,0,2*pi]); axis equal grid on axis square xlabel(x?á); ylabel(y?á); zlabel(z?á); shading flat; title(双叶双曲面) 双柱曲面 load clown ezsurf(2*sec(u),2*tan(u),v,[-pi/2,pi/2,-3*pi,3*pi]) hold on %在原图上继续作图 ezsurf(2*sec(u),2*tan(u),v,[pi/2,3*pi/2,-3*pi,3*pi]) colormap(map) shading interp view(-15,30) axis equal grid on axis equal xlabel(x轴); ylabel(y轴); zlabel(z轴); shading flat; title(双柱曲面)