Running matlab codes in python

Question

I am following this link to run matlab code in python: Running Matlab using Python gives 'No module named matlab.engine' error

I am getting the error:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Users\XYZ\AppData\Local\Programs\Python\Python36\lib\site-packages\matlab\engine\matlabengine.py", line 71, in __call___stderr, feval=True).result()
File "C:\Users\XYZ\AppData\Local\Programs\Python\Python36\lib\site-packages\matlab\engine\futureresult.py", line 67, in result
return self.__future.result(timeout)
File "C:\Users\XYZ\AppData\Local\Programs\Python\Python36\lib\site-packages\matlab\engine\fevalfuture.py", line 82, in result
self._result = pythonengine.getFEvalResult(self._future,self._nargout, None,out=self._out, err=self._err)

matlab.engine.EngineError: MATLAB function cannot be evaluated

I am using Python 3.6 windows 7, 64 bit Matlab R2018b version

I have just written a simple function in matlab and saved the file as demo.m The code is here:

 printk();
 function printk()
     fprintf(' Hello world!');
 end

and saved the file as demo.mat

Python idle:

import matlab.engine
eng = matlab.engine.start_matlab()
eng.demo(nargout=0)

Can anyone please help. I need to migrate whole bunch of codes in python. Any other possible way would be appreciated. Thanks.

Did you read the instructions on how to install the Python package? mathworks.com/help/matlab/matlab_external/… — Cris Luengo
– Cris Luengo, Commented Dec 3, 2018 at 16:45
Does it only happen with fprintf? have you tried some other function that does not use MATLAB's I/O features? Perhaps you cannot write in command line using MATLAB fucntions in python — Ander Biguri
– Ander Biguri, Commented Dec 3, 2018 at 16:48
Yes I installed in the same way as mentioned in the link At a macOS or Linux operating system prompt — cd "matlabroot/extern/engines/python" python setup.py install Instead I used windows. — Shubham Bajaj
– Shubham Bajaj, Commented Dec 3, 2018 at 16:51
I need to check if it happens only with fprintf. Is there any alternative for it? — Shubham Bajaj
– Shubham Bajaj, Commented Dec 3, 2018 at 16:52
you say you saved it as a .mat file? .mat files are for matlab data. You should save it as a .m file. Apart from this I'm not sure if fprintf would work the way you want it to. I have no experience with the python engine but i know that with the c engine the print commands don't do anything. These output to the matlab command window and not to your python command window. If you want to print out something i think you're better off returning them to python and printing them there. — Alexander Vandenberghe
– Alexander Vandenberghe, Commented Dec 4, 2018 at 14:59

Ville · Accepted Answer · 2019-03-07 16:50:19Z

0

You need 64 bit python, if you have 64 bit matlab.

Maybe you are looking for something like: https://github.com/Wilhox/Matlab-Shell-for-python.git

answered Mar 7, 2019 at 16:50

Ville

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