Matlab-Python calling each other

PythonIs more and more widely used, and has great advantages in deep learning, machine learning, data mining, etc., and python is open source and has a powerful third-party library, which is the biggest advantage of python. However, MATLAB is extremely optimized in terms of scientific computing, especially SIMULINK's modular programming method is very convenient. In actual applications, frequent data exchange and calling between SIMULINK and python are often required. Here is a brief introduction to MATLAB and python. Mixed programming. All operations in this document are implemented in Window10 environment.

1. MATLAB \ SIMULINK calls python function

Starting from MATLAB2014b, MATLAB supports calling Python directly. I installed the latest version of MATLAB2017b, so I can directly connect to Python after installation and verify the method of MATLAB connecting to Python.

My computer has two versions of Python, 2.7 and 3.5, which are connected to python3.5 by default. You can also manually switch to python2.7 version.

Define the python function as a very simple sum of two numbers, the file name is te2, and the function name is c2.

Call the python function in MATLAB, and call the function in the format of py.file name.function name (parameter).

See the python help documentation. More usage and examples can be found in the help documentation. The document contains two parts, namely MATLAB calls Python, and Python calls MATLAB.

Calling python function in SIMULINK, first of all, we consider that the function statement calling python will be written into MATLAB-Function. But this method needs to declare the statement as an external compilation method, which will reduce efficiency. The SIMULINK flowchart and m function are as follows:

Then use the python function in the real-time simulation environment, and use the S-Function method to call the py statement. The use of S-function does not require external compilation, which improves simulation efficiency.

S-Function is.

The above is to call the Python function through MATLAB statement and SIMULINK module.

Second, call MATLAB through Python

There are many ways to call MATLAB in Python. The engine provided by MATLAB is used for calling. This method is very convenient for calling some simple statements in MATLAB.

The specific operation is,

The following example, call MATLAB engine in python to draw.

For more details, you can refer to the official documentation:

https://cn.mathworks.com/help/matlab/matlab-engine-for-python.html

Also use many methods to directly call matlab: