Combine Contour Plot and Quiver Plot
Display contour lines and gradient vectors on the same plot.
Plot 10 contours of over a grid from -2 to 2 in the x and y directions.
[X,Y] = meshgrid(-2:0.2:2); Z = X .* exp(-X.^2 - Y.^2); contour(X,Y,Z,10)
Calculate the 2-D gradient of
Z using the
gradient function. The
gradient function returns
U as the gradient in the x-direction and
V as the gradient in the y-direction. Display arrows indicating the gradient values using the
[U,V] = gradient(Z,0.2,0.2); hold on quiver(X,Y,U,V) hold off