How can I concatenate or merge two structures?

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MathWorks Support Team
MathWorks Support Team le 27 Juin 2009
I would like to merge two structures into a new structure containing all the fields of the two original structures. How can I do this in MATLAB?

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MathWorks Support Team
MathWorks Support Team le 28 Mar 2023
Modifié(e) : MathWorks Support Team le 30 Mar 2023
There is no direct ability in MATLAB that can be used to concatenate structures.
The attached file "mergeStructs.m" shows a number of methods that can be used to merge structures in MATLAB.
There are also online submissions on the MATLAB Central User Community that you can use. One such submission is:
Note that MathWorks does not guarantee or warrant the use or content of these submissions. Any questions, issues, or complaints should be directed to the contributing author.
  1 commentaire
Royi Avital
Royi Avital le 23 Mai 2020
Is there a way which is MATLAB Codeer friendly?

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Plus de réponses (3)

Ba Mo
Ba Mo le 12 Nov 2019
This works IF AND ONLY IF there are no common fields (duplicate fields) in the 2 structures.
mergestructs = @(x,y) cell2struct([struct2cell(x);struct2cell(y)],[fieldnames(x);fieldnames(y)]);
I don't see why nobody pointed this out. it's intuitive!
  2 commentaires
Adam Danz
Adam Danz le 10 Fév 2021
Nice one, Ba Mo.
(Answer edited to format the line of code)
KAE
KAE le 16 Fév 2023
How do I execute this if I have two structures named Struct1 and Struct2?

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James
James le 23 Août 2016
You can do this manually:
f = fieldnames(structA);
for i = 1:length(f)
structB.(f{i}) = structA.(f{i})
end

John Beaumont
John Beaumont le 12 Sep 2017
Convert structures to tables, then merge tables, then convert resulting table back to a structure.
% Create 1st structure
aa_s.val1 = 1;
aa_s.val2 = 2;
% Create 2nd structure
bb_s.val3 = 3;
bb_s.val4 = 4;
% Convert structures to tables
aa_t = struct2table( aa_s );
bb_t = struct2table( bb_s );
% Concatonate tables
merge_t = [ aa_t ,bb_t ];
% Convert table to structure
merge_s = table2struct( merge_t )

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