Is it possible to insert multidimensional arrays within table entries?

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deathtime 2023-4-14

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回答： the cyclist 2023-4-14

For example: I want to create a table with 5 rows and 2 columns. The first column is just 5 rows of doubles. Can I insert a 3x3x2 array into every row of the second column?

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Dyuman Joshi 2023-4-14

编辑：Dyuman Joshi 2023-4-14

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It is possible, but technically it's a 1x1 cell array which contains the 3x3x2 double array -

data1 = rand(5, 1);
data2 = repmat({rand(3,3,2)}, 5, 1);
y=table(data1, data2)
y = 5×2 table
     data1          data2     
    ________    ______________

     0.67046    {3×3×2 double}
     0.30826    {3×3×2 double}
     0.65208    {3×3×2 double}
      0.8973    {3×3×2 double}
    0.046877    {3×3×2 double}

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Answer 1

the cyclist 2023-4-14

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I don't think an element of table can be a mutli-dimensional array, but it can be a cell that holds a multidimensional array:

% Create a cell array that will be converted to a table
c = {1,rand(3,3,2);
     2,rand(3,3,2);
     3,rand(3,3,2);
     4,rand(3,3,2);
     5,rand(3,3,2)
     };
% Convert to table
t = cell2table(c)
t = 5×2 table
    c1          c2      
    __    ______________

    1     {3×3×2 double}
    2     {3×3×2 double}
    3     {3×3×2 double}
    4     {3×3×2 double}
    5     {3×3×2 double}
% Contents of t(1,2) is a cell array
t{1,2}
ans = 1×1 cell array
    {3×3×2 double}
% Contents of that cell is the 3,3,2 array
t{1,2}{:}
ans = 
ans(:,:,1) =

    0.0665    0.1908    0.2427
    0.5777    0.5714    0.0996
    0.8492    0.3431    0.9827


ans(:,:,2) =

    0.2977    0.2038    0.3317
    0.9687    0.0533    0.0859
    0.9267    0.6033    0.2975