在命令提示符处，将目录改变到需要的文件夹，并输入以下命令来下载Shindig beta3。
From your command prompt, change the directory to the wanted folder, and enter the following command to download Shindig beta3.
你必须有参数目录的修改权限，否则在改变参数时MATLAB会在命令窗提示一个错误。
You must have write access to the preferences directory, or MATLAB generates an error in the Command Windowwhen you try to change preferences.
提示：这个函数重新读取了目录，它是用来查找目录中发生的改变的。
Tip: This function re-reads the directory, and can be used to check for changes in a directory.
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