中文说明：
用matlab画矩形排样图。【WL数组中第一列至第四列分别为：矩形长、矩形宽、矩形左下角横坐标、矩形左下角纵坐标】
English Description：
Draw rectangular layout with MATLAB. [the first to fourth columns in the WL array are: rectangle length, rectangle width, abscissa of the lower left corner of the rectangle, and ordinate of the lower left corner of the rectangle]