Creating table with array in element

2021 6 2
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I am trying to create a table which includes an array in each row (like the output from regionprops etc.)
I know how to do it by creating a struct and using struct2table, but is there are way to create a blank table with an array variable using the table('Size', [..], 'VariableTypes', ...) constructor?
I have tried searching but any useful results are buried under posts about array2table.

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Walter Roberson
Walter Roberson 2021-6-2
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Ran in:
You do not need to do anything special. Once the variable exists, you can write over the content with an array
t = table('Size', [3 2], 'VariableTypes', {'uint8', 'double'})
t = 3×2 table
Var1 Var2 ____ ____ 0 0 0 0 0 0
t.Var2 = zeros(3, 2)
t = 3×2 table
Var1 Var2 ____ ______ 0 0 0 0 0 0 0 0 0
The only challenge would be to have a variable created in the table to have an initial size that has multiple columns; there is no provision for doing that as one step (other than calling table() and passing in content of the appropriate size.)

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Philip Shaw
Philip Shaw 2021-6-2
I see, I was trying to assign the individual elements and so getting a size mismatch.
I suppose that means there's no way to put a multi-row matrix in a table element, apart from wrapping it in a cell or reshaping it so the first dimension has length 1.
Walter Roberson
Walter Roberson 2021-6-2
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Ran in:
You can see that regionpops does it by using cell() for the multi-row entries.
img = imread('cameraman.tif');
bw = img > 224;
imshow(bw)
props = regionprops('table', bw, 'area', 'centroid', 'extrema')
props = 31×3 table
Area Centroid Extrema ____ ________________ ____________ 28 106.61 173.61 {8×2 double} 1 103 76 {8×2 double} 69 105.81 242.49 {8×2 double} 5 108 230 {8×2 double} 1 111 215 {8×2 double} 6 112.83 206.33 {8×2 double} 3 112 210 {8×2 double} 1 116 190 {8×2 double} 1 119 175 {8×2 double} 3 130 89 {8×2 double} 89 140.51 95.562 {8×2 double} 46 135.2 143.52 {8×2 double} 2 135.5 165 {8×2 double} 1 135 180 {8×2 double} 18 135 190.5 {8×2 double} 2 137 114.5 {8×2 double}
varfun(@class, props)
ans = 1×3 table
class_Area class_Centroid class_Extrema __________ ______________ _____________ double double cell

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