Include several folders into path using Matlab Engine for Python

Hi everyone,

I've just found out the Matlab engine for Python and I've managed to install it and the simple commands work well as well. Now I have a problem:

I have a huge library with a lot of subfolders. Inside them there are a lot of functions and there are functions that call other functions through these folders. As you may know, in Matlab is not a problem until I specify the path and include all these folders in the path.

How can I do that in my python code? This is what I've written in python:

import matlab.engine
eng = matlab.engine.start_matlab()
path = r'C:\Users\*name*\Desktop\pythonProject\sfs-matlab-master'
eng.cd(path, nargout=0)
eng.example(nargout=0) 

What I've done was:

1) put the library "sfs-matlab-master" into my python_project folder

2) Inside this library I have a script "example.m" which in turn call other functions inside the library

When I run the python code I got this error

Undefined function 'sound_field_mono_nfchoa' for input arguments of type 'struct'.

where "sound_field_mono_nfchoa" is a script which is inside other subfolders.

Hope I've made myself clear and that you could help me :)

Answer 1

[Athul Prakash]

Hi Davide,

If you're in MATLAB at the command line, you may use genpath and addpath as follows to add a folder 'myOuterFolder' and all its subfolders to the MATLAB path:

addpath(genpath('myOuterFolder'));

You may call the same function(s) in the MATLAB Engine as well:

eng = matlab.engine.start_matlab()
s = eng.genpath('myOuterFodler')
eng.addpath(s, nargout=0)

Hope it helps!

[Stefanie Schwarz]

To add the paths to the MATLAB path permanently (so it is loaded automatically for every MATLAB session), make sure to run this in MATLAB:

addpath(genpath('myOuterFolder'));
savepath

In case this throws an error, refer to: https://www.mathworks.com/matlabcentral/answers/95811-why-can-t-i-save-my-matlab-path-on-windows-with-user-account-control-uac-enabled