用matlab设计界面。用GUI可以绘制各种图形，自由选择，可以选择是否有网格和是否显示坐标和标题，可任意选择图形的颜色和点型-Matlab design interface.With GUI can draw various graphics, the freedom to choose, can choose whether or not there is a grid and display coordinates, and the title, the color of the grap