From Rave Documentation
The "MATLAB path" is the list of all directories that MATLAB looks in for functions and other files. Any function file you want to use in Rave must be in a directory that is on your matlab path.
Changing your MATLAB path
To change the path:
- Open MATLAB
- Click "File>>Set Path"
- Click "Add folder " or "Add with subfolders"
- Browse to the desired directory and click "Ok'
- Click "Save" and then "Close".