绘制数据图

9.1 绘制向量图   2. plot(sample,mass2,"r*")   3. hold on plot(sample,mass1,"ks")   4. 5. plot(v1) 6. plot(v1,"LineWidth",3) 7. plot(sample,v1,"ro","LineWidth",4)   9.2 编写绘图注释 title("Sample Mass") 2. ylabel

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