Graphics

Two-Dimensional Quiver Plots

The quiver function shows vectors at given points in two-dimensional space. The vectors are defined by x and y components.

A quiver plot is useful when displayed with another plot. For example, create 10 contours of the peaks function (see the "Contour Plots" section for more information).

• n = -2.0:.2:2.0;
  [X,Y,Z] = peaks(n);
  contour(X,Y,Z,10)
  
  
  

Now use gradient to create the vector components to use as inputs to quiver.

• [U,V] = gradient(Z,.2);
  

Set hold to on and add the contour plot.

• hold on
  quiver(X,Y,U,V)
  hold off 
  
  
  

Feather Plots

Three-Dimensional Quiver Plots