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# How do I combine a structure array into one structure

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Shelley Snider on 8 Jun 2021
Answered: James Tursa on 8 Jun 2021
I have a structure array where each field of the same name is the same size. I want to combine each field over the array into one field. For example:
A(1).x = [1 2 3];
A(1).y = [4 5 6];
A(2).x = [7 8 9];
A(2).y = [10 11 12];
I want the new structure to be
B.x = [1 2 3;
7 8 9];
B.y = [4 5 6;
10 11 12];
These could also be a cell of structures if that makes things easier.
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### Accepted Answer

Walter Roberson on 8 Jun 2021
A(1).x = [1 2 3];
A(1).y = [4 5 6];
A(2).x = [7 8 9];
A(2).y = [10 11 12];
B.x = vertcat(A.x);
B.y = vertcat(A.y);
B
B = struct with fields:
x: [2×3 double] y: [2×3 double]
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### More Answers (1)

James Tursa on 8 Jun 2021
F = fieldnames(A);
n = numel(F);
C = arrayfun(@(i)vertcat(A.(F{i})),1:n,'uni',false);
FC = [F';C];
B = struct(FC{:});
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