 　　使用　　PLOT(T,Y1,Y2,…])命令，绘图命令plot绘制x-y坐标图；

 　　使用HOLD 命令，保持住该图形窗口的内容，再画一条线。并且该线型的颜色、标记符号可以选择。

 　　利用PLOT(X1,Y1,X2,Y2,..XN,YN)语句， X1,Y1,X2,Y2,..XN,YN分别为向量对，每一对X-Y可画出多条图形。

 　　使用PLOTYY命令，可设坐标。

 　　利用二维绘图函数patch函数fill ，可绘制填充图。

-　the use of PLOT (T, Y1, Y2, ...]) command, the command plot graphics rendering map xy coordinates　　use the HOLD command, to maintain the contents of the graphics window, and then draw a line. And the line color, marker symbols to choose from. 　use of PLOT (X1, Y1, X2, Y2, .. XN, YN) statement, X1, Y1, X2, Y2, .. XN, YN vector were right, each of a number of XY can draw graphics. 　use PLOTYY order to set the coordinates. 　the use of two-dimensional mapping function patch function of fill, can be filled with map drawing.