The ability to change the interpolation method for the shading rate or color gradient is not available in MATLAB 7.0.4.
To work around this issue, manually adjust the extent to which a figure is shaded with a certain color by changing the colormap of the figure. For example, the following code will first color a sphere using the default colormap. It will then modify the figures's colormap to achieve a different color gradient.
sphere(30)
axis equal
colormap bone
a=colormap;
a(1:30,1:3)=.5;
colormap(a)
This displays a sphere with most of the sphere shaded from grey to white instead of from black to white. By appropriately changing the values of the colormap matrix (each element takes values between 0 and 1), it is possible to implement a desired shading scheme. You can also influence color gradients by specifying lighting characteristics, such as light position and the ratio of ambient and diffuse components.
