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How should I recover.m file of the function in the toolbox?

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Mistakenly modified the .m file that came with MATLAB. How should I recover it?
Why doesn't MATLAB make the .m file of the function in the toolbox "read-only" Does anyone know why?Is there any way to change all MATLAB official .m files to "read-only"?
Rik on 23 Jun 2023
You might need to re-install Matlab unless your OS provides some form of file restore.
Marking files as read-only may not actually sufficiently protect files, since you may want to edit those anyway. In this case you learned you shouldn't open and edit Matlab internal functions.
fa wu
fa wu on 23 Jun 2023
Sometimes I tracking code goes into the Matlab internal functions.May delete code by mistake!

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Accepted Answer

Jan on 25 Jun 2023
You can ask a colleage for the original file. Of course with some tricks you can find a way to type the file here in the forum also.
Do not work with Admin privileges. Then the m-files in the installation directory are safe.

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