>plot(x,f3,'r','linewidth',2); >plot (x,f5,'-.k','linewidth',2) >plot(x,f10,'.b'): 输出效果图为图10-12. 4 3 2 图10-1 5 >> plot(x,f3,'r','linewidth',2); >> plot(x,f5,'-.k','linewidth',2); >> plot(x,f10,'.b'); 输出效果图为图 10-12. 图 10-1