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

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]

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]

Sometimes I tracking code goes into the Matlab internal functions.May delete code by mistake！

Answer 1

[Jan]

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.

[fa wu]

thank you！