Graphics

Changing the Offset of a Contour

The surfc and meshc functions display contours beneath a surface or a mesh plot. These functions draw the contour plot at the axes' minimum z-axis limit. To specify your own offset, you must change the ZData values of the contour lines. First, save the handles of the graphics objects created by meshc or surfc.

• h = meshc(peaks(20));
  

The first handle belongs to the mesh or surface. The remaining handles belong to the contours you want to change. To raise the contour plane, add 2 to the z coordinate of each contour line.

• for i = 2:length(h);
      newz = get(h(i),'Zdata') + 2;
      set(h(i),'Zdata',newz)
  end
  

The Contouring Algorithm

Displaying Contours in Polar Coordinates

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