运行时错误：在python中使用包装器时，MATLAB位置未知

Question

I am trying to use a Matlab wrapper for my code in the ipython spyder IDE. I get the following error when I run the code:

raise RuntimeError("Unknown MATLAB location: try to initialize MatlabSession with matlab_root set properly.")

RuntimeError: Unknown MATLAB location: try to initialize MatlabSession with matlab_root set properly.

I'm hoping this is a simple fix to import a module or change a setting in spyder. Or if anyone knows how to set the matlab_root? Any help would be much appreciated, Thank You!

Answer 1

Basically matlab_root is a variable inside MatlabSession , that points to the folder where MATLAB is installed. What is happening here is that probably matlab_root has a default value that is not where your MATLAB is installed. you need to change/set this variable to the folder where MATLAB is installed.

Answer 2

Set the environment directly in the code, eg (Mac OS)

import matlab_wrapper
matlab = matlab_wrapper.MatlabSession(matlab_root='/Applications/MATLAB_R2017b.app')

or try to set the environment variable via command line, eg (again Mac)

echo matlab_root='/Applications/MATLAB_R2017b.app' 

Also, see the matlab_wrapper FAQ: https://github.com/mrkrd/matlab_wrapper/blob/master/FAQ.rst

An additional option is to use the native wrapper (matlab-engine) from Mathworks, see here: https://www.mathworks.com/help/matlab/matlab-engine-for-python.html