为什么Matlab在文件名中看不懂*? [英] Why matlab does not understand * in the names of files?

问题描述

我尝试使用:

dir('dirname\*')

，但它不起作用.在我开始使用后，它开始工作:

and it did not work. It started to work after I started to use:

dir('dirname\m*')

有人知道为什么吗?

推荐答案

Matlab可以理解通配符*，但是您以不走运的方式尝试遵守Windows cmd路径约定，因此输入了字符串\*，即文字星号(由于转义的反斜杠).

Matlab does understand wildcards *, but in the way you unluckiliy tried to adhere to Windows cmd path conventions, you entered the string \*, which is a literal asterisk (due to the escaping backslash).

一种变通方法或在所有平台上指定路径的首选方法是使用斜杠/作为目录分隔符.

A workaround, or the preferred way to specify paths on all platforms, is using a forward slash / as a directory seperator.

dir('dirname/*')

这也解释了为什么在反斜杠后添加m可以解决"该问题；星号不再是文字星号，而是允许解释为通配符.

This also explains why adding the m after the backslash "fixed" the issue; the asterisk was no longer a literal asterisk, but allowed to be interpreted as a wildcard character.

文档明确表示允许通配符并且可以使用通配符符合预期(请参见上面的说明).

Documentation explicitely says the wildcard character is allowed and works as expected (see my explanation above).

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