example_quiver.asv

基础程序

% example_quiver.m
% 绘制矢量图
[X,Y]=meshgrid(-2:.2:2);
Z=X.*exp(-X.^2 - Y.^2);
[DX,DY] = gradient(Z,.2,.2);
contour(X,Y,Z)
hold on
quiver(X,Y,DX,DY)
colormap hsv
hold of