How to run a python code on simulink?
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Nitharshini Sivakumar
el 4 de Oct. de 2017
Comentada: PRANESH KUMAR
el 29 de Mzo. de 2022
I am trying do some image processing and have codes written in python. I am trying to make it run on matlab/simulink. Is there a simulink block that can run python codes? Something like I can give an input to the block, it will run the python code and give the output.
1 comentario
faazila fathima
el 9 de Jul. de 2021
sir i tried calling python from matlab, but am unable to do. pls help am getting this error 'Caused by:
Undefined function 'py.te2.c2' for input arguments of type 'double'.
Respuesta aceptada
Nick Choi
el 6 de Oct. de 2017
You could try using a MATLAB function block that contains MATLAB code to call the Python code.
This documentation link provides an example of how to integrate a MATLAB function block into a Simulink model,
and this documentation link contains useful information on how to use Python code with MATLAB: https://www.mathworks.com/help/matlab/getting-started-with-python.html
One thing to note is that not all MATLAB functionalities will be supported for code generation so you may need to use 'coder.extrinsic' in the MATLAB function block. Additional information on 'coder.extrinsic' can be found here:
7 comentarios
Sean de Wolski
el 17 de Mzo. de 2021
Editada: Sean de Wolski
el 17 de Mzo. de 2021
It is possible to call python code inside of a C S-Function. It's fairly involved and requires connecting a lot of pipes. Please contact if this interests you or ask a new question.
PRANESH KUMAR
el 29 de Mzo. de 2022
I want to run python code which is inside raspberry pi and simulink on pc.how to go about it
Más respuestas (2)
Lode De Herdt
el 24 de Mzo. de 2020
Yes, this is possible to do. A very simple example of Python code running in Simulink using the MATLAB Function block:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/279124/image.png)
The MATLAB Function block refers to this code:
function out = RunPython(in1, in2)
out = 0; % Has to be preassigned, otherwise Simulink throws an error
coder.extrinsic('py.Example.test') % Python functions have to be run extrinsically, meaning no C code generated
out = py.Example.test(in1,in2);
end
And the Python code (in Example.py file) is:
def test(in1,in2):
out = in1+in2
return out
11 comentarios
Sean de Wolski
el 17 de Mayo de 2021
K G V,
You could convert the py.list to a cell array c = cell(list) but even that doesn't make much sense to propagate as a Simulink signal. You'll probably want to grab the elements inside of it and determine what to do with them. Can you give more insight into the use case? And probably worth it to create a new question.
faazila fathima
el 14 de Jul. de 2021
sir, i tried exactly what u did.
But when i call the python code in matlab command window, am getting this error. what does this error mean?
Unrecognized function or variable 'in1'.
Weiwu Li
el 19 de Oct. de 2021
Editada: Weiwu Li
el 19 de Oct. de 2021
You can either use a MATLAB function block or a MATLAB System block to bring Python code into Simulink.
For a more complex / realistic example (using Python for human detection), you can refer to this file exchange submission:
2 comentarios
Bartosz Soltowski
el 7 de Dic. de 2021
Editada: Bartosz Soltowski
el 7 de Dic. de 2021
Hi,
I managed to integrate Python functions into my Simulink code but I am facing problems while deploying the system into external hardware (Raspberry PI). The Matlab coder does not recognise extrinsic functions. Is there any solution to that problem?
Sean de Wolski
el 10 de Dic. de 2021
The solution is to use a C-S function and a custom TLC that tells the MATLAB code generator how to generate C code that can communicate with Python. As I said above, this is doable but really hard and involved. It's like me in English trying to tell someone who speaks Korean how to communicate with someone who speaks Swahili.
In general, it would be far better to take the python things you're doing right now in coder.extrinsic and rewrite them in Simulink/MATLAB/C/C++. Can you describe what the python piece is doing right now and what the data I/O from the MATLAB function to it are?
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