例题运行步骤:在Matlab命令窗口将本章目录置于当前目录；在Matlab命令窗口的当前目录中打开本章目录中的M文件Exam.m；在Exam.m文件中，将待运行例题前的注释符号“ ”去掉，并保留其他例题前的注释符号“ ”；在命令窗口键入：Exam 并回车即可运行该例题。-Example run these steps: In the Matlab command window will be placed in this chapter directory the current directory　in the Matlab command window to open the current directory in the directory of this chapter M files Exam.m　in Exam.m file, will be run before the note symbol example "　"　removed and reserved comment symbol in front of the other examples, "　"　 in the command window, type: Exam and press Enter to run the examples.