说明：  使用matlab语言，用7种方法绘制立方体，有详细说明和配图。对于了解matlab三维绘图的基本语句有借鉴作用。初学者非常适合。
(Using matlab language, with 7 kinds of methods of drawing a cube, with a detailed description and distribution map. Matlab for the understanding of the basic sentence of three-dimensional graphics are used for reference. Very suitable for beginners.)