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MATLAB API for Python

Write Python® programs that work with MATLAB®

The MATLAB Engine API for Python provides a package for Python to call MATLAB as a computational engine. The engine supports the reference implementation (CPython) for Python versions 2.7, 3.5, and 3.6.

Functions

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matlab.engine.start_matlabStart MATLAB Engine for Python
matlab.engine.find_matlabFind shared MATLAB sessions to connect to MATLAB Engine for Python
matlab.engine.connect_matlabConnect shared MATLAB session to MATLAB Engine for Python
matlab.engine.shareEngineConvert running MATLAB session to shared session
matlab.engine.engineNameReturn name of shared MATLAB session
matlab.engine.isEngineSharedDetermine if MATLAB session is shared

Classes

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matlab.engine.MatlabEnginePython object using MATLAB as computational engine within Python session
matlab.engine.FutureResultResults of asynchronous call to MATLAB function stored in Python object

Topics

Installing

System Requirements for MATLAB Engine API for Python

What you need to write and build MATLAB engine applications for Python.

Install MATLAB Engine API for Python

To start the MATLAB engine within a Python session, you first must install the engine API as a Python package.

Install MATLAB Engine API for Python in Nondefault Locations

By default, the installer builds the engine API for Python in the matlabroot\extern\engines\python folder. If you install in another folder, update the PYTHONPATH variable.

Getting Started

Get Started with MATLAB Engine API for Python

The MATLAB Engine API for Python provides a Python package named matlab that enables you to call MATLAB functions from Python.

Start and Stop MATLAB Engine for Python

Options for starting the MATLAB Engine for Python.

Call MATLAB Functions from Python

How to return an output argument from a MATLAB function. How to read multiple outputs from a function. What to do when the MATLAB function does not return an output argument.

Get Help for MATLAB Functions from Python

From Python, you can access supporting documentation for all MATLAB functions.

Session Management

Connect Python to Running MATLAB Session

How to connect the MATLAB Engine for Python to a shared MATLAB session that is already running on your local machine.

Using MATLAB Workspace

Use MATLAB Engine Workspace in Python

This example shows how to add variables to the MATLAB engine workspace in Python.

Data Exchange and Mapping

Use MATLAB Arrays in Python

This example shows how to create a MATLAB array in Python and pass it as the input argument to the MATLAB sqrt function.

MATLAB Arrays as Python Variables

The matlab Python package provides array classes to represent arrays of MATLAB numeric types as Python variables so that MATLAB arrays can be passed between Python and MATLAB.

Pass Data to MATLAB from Python

When you pass Python data as input arguments to MATLAB functions, the MATLAB Engine for Python converts the data into equivalent MATLAB data types.

Handle Data Returned from MATLAB to Python

When MATLAB functions return output arguments, the MATLAB Engine API for Python converts the data into equivalent Python data types.

Use MATLAB Handle Objects in Python

This example shows how to create an object from a MATLAB handle class and call its methods in Python.

Default Numeric Types in MATLAB and Python

MATLAB stores all numeric values as double-precision floating point numbers by default.

Calling MATLAB Functions

Call User Scripts and Functions from Python

This example shows how to call a MATLAB script to compute the area of a triangle from Python.

Sort and Plot MATLAB Data from Python

This example shows how to sort data about patients into lists of smokers and nonsmokers in Python and plot blood pressure readings for the patients with MATLAB.

Call MATLAB Functions Asynchronously from Python

This example shows how to call the MATLAB sqrt function asynchronously from Python and retrieve the square root later.

Redirect Standard Output and Error to Python

This example shows how to redirect standard output and standard error from a MATLAB function to Python StringIO objects.

Troubleshooting

Limitations to MATLAB Engine API for Python

Features Not Supported in MATLAB

Troubleshoot MATLAB Errors in Python

When a MATLAB function raises an error, the MATLAB Engine for Python stops the function and catches the exception raised by MATLAB.

Related Information