Extracting data from struct as array

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Rashi Monga
Rashi Monga 2024-6-13
编辑： Rashi Monga 2024-6-13
Hi, I have a following structure:
S(1).a = 1:10;
S(2).a = 11:20;
S(3).a = 21:30;
I want the output in the following format:
y = [1:10; 11:20; 21:30];
Using [S(1:3).a] concatenates it in a single direction. Is there a better way (other than for loop) to extract the data in the requisite format?
Thank you,
Rashi

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采纳的回答

Stephen23
Stephen23 2024-6-13
编辑：Stephen23 2024-6-13
Ran in:
S(1).a = 1:10;
S(2).a = 11:20;
S(3).a = 21:30;
M = vertcat(S.a)
M = 3x10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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or
M = cat(1,S.a)
M = 3x10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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https://www.mathworks.com/matlabcentral/discussions/tips/847976-tutorial-comma-separated-lists-and-how-to-use-them

更多回答（1 个）

Ganesh
Ganesh 2024-6-13
Ran in:
Hi @Rashi Monga,
You can use "vertcat()" for using the same. Refer to the following code:
% Your structure
S(1).a = 1:10;
S(2).a = 11:20;
S(3).a = 21:30;
% Extracting and concatenating
y = vertcat(S.a); % This works directly because of how MATLAB handles struct arrays
y
y = 3x10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
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For more information on the function "vertcat()", refer to the following documentation:
https://www.mathworks.com/help/matlab/ref/double.vertcat.html

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