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>> [X,Y]=meshgrid(-2:.2:2);
>> Z=X.*exp(-X.^2-Y.^2);
>> [DX,DY]=gradient(Z,0.2,0.2);
>> contour(X,Y,Z);
>> hold on;
>> quiver(X,Y,DX,DY);
>> h=get(gca,'Children');
>> set(h,'Color','k');
>>
运行结果图:
>> t=linspace(-pi,pi,20); [X,Y]=meshgrid(t); Z=cos(X).*sin(Y); subplot(2,2,1); mesh(X,Y,Z); title('mesh'); >> >> subplot(2,2,2); >> surf(X,Y,Z); >> alpha(0.5); >> title('surf'); >> >> subplot(2,2,3); >> surfl(X,Y,Z); >> title('surfl'); >> >> subplot(2,2,4); >> surfc(X,Y,Z); >> title('surfc'); >>
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