Call MATLAB RayleighFading in python

Hello,

I'm trying to use comm.RayleighFading object from MATLAB in python. After initiating the object, I called that object taking the argument being my input data. However, it returned an error: TypeError: 'matlab.object' object is not callable

How to use this object in python properly? I appreciate the help!

eng = matlab.engine.start_matlab()
rl_channel = eng.comm.RayleighChannel()
y = rl_channel(input)

Answer 1

[Narvik]

Hi,

I understand that you are facing an issue while trying to use a MATLAB object in Python. The error “TypeError: 'matlab.object' object is not callable” occurs when you try to call, with ‘()’, an object that is not callable.

To use a MATLAB object properly in Python:

• Add the object to the MATLAB engine workspace.
• Call the MATLAB “eval” function to execute the required statement (‘rl_channel(input)’ in this case) in MATLAB.

Please find the example code below:

import matlab.engine  
eng = matlab.engine.start_matlab()  
rl_channel = eng.comm.RayleighChannel()  

% add object to MATLAB engine workspace. 
eng.workspace['rl_channel'] = rl_channel  
% call rl_channel with your input using eval function. 
y = eng.eval('rl_channel(input)') 

For more information on using the MATLAB workspace in Python and “eval” function, refer to the following documentation links:

https://www.mathworks.com/help/matlab/matlab_external/use-the-matlab-engine-workspace-in-python.html

https://www.mathworks.com/help/matlab/ref/eval.html

Hope this helps!