Open Simulink model using Matlab engine for python

Installed matlab engine for python as mentioned

https://www.mathworks.com/help/matlab/matlab_external/connect-python-to-running-matlab-session.html

 below command in python terminal gave me error

>>> import matlab.engine

>>> eng = matlab.engine.connect_matlab()

>>> eng.sqrt(4.0)

2.0

>>> eng.open_system('fcc_to_icd1.slx')

Too many output arguments

Traceback (most recent call last): File "<stdin>", line 1, in module File "C:\ProgramData\Anaconda3\lib\site-packages\matlab\engine\matlabengine.py", line 78, in _call_ stderr, feval=True).result() File "C:\ProgramData\Anaconda3\lib\site-packages\matlab\engine\futureresult.py", line 68, in result return self._future.result(timeout) File "C:\ProgramData\Anaconda3\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.MatlabExecutionError: Too many output arguments

is there a way to open simulink models using python matlab engine ?

Answer 1

[Stephan]

Hi,

make and save a .m-file in your matlab folder containing the following line:

open_system('name of your file')

then call this script from python with:

import matlab.engine
eng = matlab.engine.connect_matlab()
eng.your_script_name(nargout=0)

This should call the script which then calls simulink to open your model.

Best regards

Stephan

[svanimisetti]

Alternatively, just use the following!

>>> eng.open_system('vdp',nargout=0)

Seems to work for me. Also, if you don't care about opening the model in the Simulink GUI, just load the system and run it. If your model defines tout and yout, these are returned back to Python by evaluating the variables from Matlab workspace. Otherwise, the 'results' variable will have the standard output vector/array.

>>> eng.load_system('vdp')
>>> results = eng.sim('vdp')
>>> %#eng.bdclose('vdp')
>>> eng.close_system('vdp',nargout=0)