I cannot save matlab editor, the .m file.

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Yuge Zhang
Yuge Zhang 2021-8-9
评论： Walter Roberson 2025-3-11
Hi,
When I save the .m file, it warning that " The matlab editor cannot use US-ASCII encoding to save the file, please use UTF-8 encoding to save the file ". Am I missing some kind of file? What do I need to do? The computer I use is MAC, the matlab version is R0221a.
Look forward to your reply!

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回答（4 个）

Walter Roberson
Walter Roberson 2021-8-12
Use Save As to save the file. The saving box that comes up will have a menu that allows you to select the format of the file to save as. Make sure that UTF8 is selected, not ISO-8896-1 and not "all .m files"
Constantino Carlos Reyes-Aldasoro
I guess that you must have used some special characters like accents, have you copy-pasted something into the editor?
  2 个评论
Walter Roberson
Walter Roberson 2021-8-10
Right, you can get this message if your file includes any character whose Unicode code is outside the range 0 to 255.
Yuge Zhang
Yuge Zhang 2021-8-12
I can’t use it after I clean the computer. I suspect that some files have been deleted automatically.

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DGM
DGM 2021-8-9
You might want to check what your locale settings are
feature('locale')
and see if any of this is of use:
https://www.mathworks.com/matlabcentral/answers/340903-unicode-characters-in-m-file
My understanding was that this should be utf8 in that version/env, but maybe yours is set to us-ascii for some reason.
This might also be of help.
https://www.mathworks.com/help/matlab/release-notes.html?rntext=internationalization&startrelease=R2012a&endrelease=R2017a&groupby=release&sortby=descending&searchHighlight=internationalization
shakiba
shakiba 2025-3-11
why when i want to save my matlab file i have 2 options one is (utf-8) and another is (windows-1256) which one is correct option for saving my file i picked both each time and after saving a function code it showed an error
  1 个评论
Walter Roberson
Walter Roberson 2025-3-11
Save to windows-1256:
  • if you need to use an editor that only supports single-byte characters
  • if you need to read the file with a facility that only supports single-byte characters
  • if you need to use the file with a sufficiently old version of MATLAB that did not support utf-8
Otherwise... you might as well save as utf-8. utf-8 is accepted by all modern editors and all modern methods of reading files. utf-8 is portable to other operating systems, where-as windows-1256 is not portable to other operating systems.

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