Introduction.

I have the following Python function, which is saved as “anderson_darling.py”:

def ADtest(a,b):
    rng = np.random.default_rng()
    method = stats.PermutationMethod(n_resamples=9999, random_state=rng)
    res = stats.anderson_ksamp([a,b], method=method)
    print(a)
    print(b)
    print(res.statistic)
    print(res.critical_values)
    print(res.pvalue)
    
if __name__ == "__main__":
    import sys
    import numpy as np
    from scipy import stats
    input_list1 = list(map(int, sys.argv[1].strip('[]').split(',')))
    input_list2 = list(map(int, sys.argv[2].strip('[]').split(',')))
    a = np.array(input_list1)
    b = np.array(input_list2)
    ADtest(a,b)

To run this file, I open a Terminal (throgh Visual Studio Code, but this is not relevant), and I give the following command:

(base) xyz@xyz myfolder % python3 anderson_darling.py "[1,3,5,6,4,6,7,1,2,7]" "[1,3,5,6,4,6,7,1,2,7]"

The result, that appears on the Terminal is the following:

[1 3 5 6 4 6 7 1 2 7]                        % <-- array a
[1 3 5 6 4 6 7 1 2 7]                        % <-- array b
-1.4363560826434034                          % <-- res.statistic
[0.325 1.226 1.961 2.718 3.752 4.592 6.546]  % <-- res.critical_values
1.0                                          % <-- res.pvalue

My goal is make this Python file/function work on Matlab, and I type the following:

% Matlab arrays
a = [1,3,5,6,4,6,7,1,2,7];
b = [1,3,5,6,4,6,7,1,2,7];
% Convert MATLAB arrays to Python lists
py_a = py.list(a);
py_b = py.list(b);
% Call the python function "ADtest" within the "anderson_darling" function
py.anderson_darling.ADtest(py_a,py_b)

However, I get the following error on the Matlab Command Window:

Error using anderson_darling>ADtest
Python Error: NameError: name 'np' is not defined

How can I import “numpy” and “scipy” into the Matlab system?

Please consider that I have installed Anaconda, and my installed versions of Python, COnda and Matlab are the following ones.

From terminal:

% python3 --version
Python 3.12.4

% where python3
/opt/anaconda3/bin/python3
/usr/local/bin/python3
/usr/bin/python3

 % conda --version
conda 24.7.1

% conda info --envs                                         
# conda environments:
#
base                  *  /opt/anaconda3
                         /usr/local/anaconda3

From the Matlab’s Command Window:

% Python Version for your system (inside Matlab)
% https://ch.mathworks.com/help/matlab/ref/pyenv.html
>> pyenv

ans = 

  PythonEnvironment with properties:

          Version: "3.9"
       Executable: "/Library/Developer/CommandLineTools/usr/bin/python3"
          Library: "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/lib/libpython3.9.dylib"
             Home: "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9"
           Status: Loaded
    ExecutionMode: InProcess
        ProcessID: "4128"
      ProcessName: "MATLAB"
  
% Matlab version
>> version

ans =

    '23.2.0.2515942 (R2023b) Update 7'

import numpy and scipy to matlab