How to convert a 1x5x5600 cell in MATLAB to a python list that is (1,5,5600)

Question

Julia Gorman 2022-8-3

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回答： Al Danial 2022-8-5

I have a cell in MATLAB is 1x5x5600 and I need to convert it so I can use it in python and it would be easiest if it were in a list that is dimensions (1,5,5600)

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Matt J 2022-8-3

编辑：Matt J 2022-8-3

Python lists are always 1D, I believe. Only NumPy arrays have an actual shape.

Why would it help to make the list 3D?

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Answer 1

Al Danial 2022-8-5

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Lists, like cell arrays, may be nested so @J C's request is doable. Here's an example with a 1x3x5 cell:

% create the cell array
a = cell(1,3,5);
for r = 1:3
    for c = 1:5
        a{1,r,c} = r*1000 + c;
    end
end
% convert it to an equivalent, similarly shaped Python list
py_a = py.list();
py_a_level1 = py.list();
for r = 1:3
    py_a_level2 = py.list();
    for c = 1:5
        py_a_level2.append( a{1,r,c} );
    end
    py_a_level1.append( py_a_level2 );
end
py_a.append( py_a_level1 );

In Python, py_a looks like this:

In : py_a
Out: 
  [[[1001.0, 1002.0, 1003.0, 1004.0, 1005.0],
    [2001.0, 2002.0, 2003.0, 2004.0, 2005.0],
    [3001.0, 3002.0, 3003.0, 3004.0, 3005.0]]]
In : py_a[0][1][2]
Out: 2003.0