www.gusucode.com > graphics 案例源码程序 matlab代码 > graphics/ShowGradientWithQuiverPlotExample.m
%% Show Gradient with Quiver Plot % Plot the gradient of the function $z = xe^{-x^2-y^2}$. % Copyright 2015 The MathWorks, Inc. [X,Y] = meshgrid(-2:.2:2); Z = X.*exp(-X.^2 - Y.^2); [DX,DY] = gradient(Z,.2,.2); figure contour(X,Y,Z) hold on quiver(X,Y,DX,DY) hold off