如何在Matlab中使用子字符串?

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对于这是一个新问题，我深表歉意，但是我已经在此处阅读了文档，并且在使用子字符串之前不必输入任何命令.

I apologize if this is a newb question, but I have read the documentation here and it says nothing about having to input any command before using substring.

但是，当我尝试按以下方式调用它时:

However, when I try to call it as follows:

substring('hello world'，2)

substring('hello world', 2)

这给了我错误

???对于类型为'char'的输入参数，未定义的函数或方法'substring'.

??? Undefined function or method 'substring' for input arguments of type 'char'.

调用此substring的正确方法是什么?

What is the correct way to invoke this substring?

推荐答案

不要偏离OP的答案，实际上，OP的答案更直接地解决了您提出的问题，但是假设您要做的就是从中提取一定数量的字符一个字符串，MATLAB的索引就是您所需要的:

Not to detract from the OP's answer, which actually more directly adresses the question you ask, but assuming all you want to do is extract a certain number of characters from a string, MATLAB's indexing is all you need:

myString = 'Hello, world!'; mySubstring = myString(3:end) mySubstring = llo, world!