可以绘制变量的三维及四维散点图的matlab子程序，如饱和度等-plots the values in vector v colour coded at the positions specified by the vectors x, y, and z in a 3-D axis system. A colourbar is added on the right side of the figure.

在matlab中画四维图，很好用 的给新手的(draw the picture give new hand)