return more than one variable from matlab to python, using python-matlab-bridge

Question

em 2015-2-11

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/177520-return-more-than-one-variable-from-matlab-to-python-using-python-matlab-bridge

回答： Bo Li 2015-2-12

在 MATLAB Online 中打开

It is easy to return one variable from Matlab using

res = mlab.run_func('path/to/jk.m', {'arg1': 3, 'arg2': 5})

How can I return more than one variable from Matlab. For example, my .m function is as below

function [lol, sos] = jk(args)
    arg1 = args.arg1;
    arg2 = args.arg2;
    lol = arg1 + arg2;
   sos = arg1 * arg2;
end

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Answer 1

Bo Li 2015-2-12

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/177520-return-more-than-one-variable-from-matlab-to-python-using-python-matlab-bridge#answer_167774

在 MATLAB Online 中打开

Since R2014b, the MATLAB Engine for Python provides a package for Python to call MATLAB as a computational engine:

http://www.mathworks.com/help/matlab/matlab-engine-for-python.htm

Using MATLAB Engine for Python, you can set the nargout to return the number of results:

http://www.mathworks.com/help/matlab/matlab_external/call-matlab-functions-from-python.html

For your case, it should work using following code:

>>>import matlab.engine  
>>>eng = matlab.engine.start_matlab()  //launch MATLAB
>>>eng.cd('theFolderofJK', nargout=0) //change to the location to where jk.m resides.
>>>res = eng.jk({'arg1':3, 'arg2': 5}, nargout = 2)  //a tuple is returned for more than 1 result
(8L, 15L)