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】-Matlab to draw rectangles layout diagram. 【 probably in the first column to the fourth column in the array are: rectangular rectangular long, wide, abscissa rectangular corner, rectangular corner ordinate 】