Find location of current m-file in MATLAB

Question

I'm working on my MATLAB code in a number of different locations, and it would really help if I could make the code aware of its location on the computer. I think there is a function that gives me exactly this information, but I can't remember what it is called or find it on Google.

The idea is that I have a function myFunc that needs a file in its own directory, which can be in different locations on different computers. So in myFunc I want to do something like this:

dir = theFunctionImLookingFor; system(fullfile(dir, 'someApp.exe')); 

(It could also be that the function I'm looking for doesn't return the directory, but the directory + m-file name, but that makes little difference to me.)

Answer 1

mfilename or better mfilename('fullpath')

Answer 2

When working with classes I often like to keep associated data in the class directory. I use which to get the path and then fileparts to chop it up.

[folder, name, ext] = fileparts(which('object')); 

Where 'object' can be a function or class name. The advantage of this method for me is that you can call it from outside the mfile in question. This is necessary if you need to get the path to a derived class from the base class for example.