MATLAB小程序，主要用于学习绘制四维图形（其实就是透明的三维图形）的典型几个步骤。里面只有一个.m，然后有得备注，相互学习。-MATLAB small program, mainly used to learn to draw four-dimensional graphics (in fact, transparent three-dimensional graphics) typical of several steps. There is only one. M, and then get note, learn　each other.