My MATLAB code has been replaced by a function of the file name. How to recover the code?

[DGM]

Did you save the two files to the same directory?

If so, you overwrote the file. You'll either have to look for older autosave files, or you'll have to revert to backups.

https://www.mathworks.com/matlabcentral/answers/478331-how-can-i-restore-a-previous-version-of-an-m-file

https://www.mathworks.com/matlabcentral/answers/419197-i-saved-an-m-file-in-matlab-and-it-was-overwritten

Otherwise, recovery of deleted files is not guaranteed and the challenge depends on the type of filesystem and how much disk activity has happened since the file was deleted. You'll have to look up how you would do that for Windows.

If you didn't save it to the same directory, then use

which VsDistance.m -all

to verify that there are multiple files with the same name, and rename them appropriately.

[Image Analyst]

I don't even know what that means. What is "a function of the file name"? It looks like you have a function VsDistance in a file called VsDistance.m and in there are some comments, but they're followed by code that has nothing to do with the function description. Did you mistakenly paste over the code with your code and save it? If so try control-z a bunch of times (as long as you haven't exited MATLAB yet) to undo your changes.

Or see if there is a VsDistance.asv file in the same directory. That would be an automatically made backup file.

[DGM]

When you save a figure as 'mfig' instead of 'fig', saveas() creates both a .fig file and a .m file which will open the .fig file of the same name.

So it's possible a person could have a user-defined function or script VsDistance.m, create a figure, and then save the figure as VsDistance.fig, and unwittingly overwrite their working code -- or possibly just shadow it.