How to add more values to an existing structure?

Dear All,

I have an existing structure A which has several fields. Each field have 100 values. Now I want to add 20 more values to each existing field for the existing structure A. I used the following code but I got 2 structures which is not what I want.

A = [A; struct(fileds, values)]

Thanks for your help.

Benson

[dpb]

https://www.mathworks.com/matlabcentral/answers/538495-how-to-add-new-field-to-existing-structure?s_tid=answers_rc1-1_p1_MLT#answer_443191

[Benson Gou]

Hi, dpb,

I do not want to add a New Field to structure A. I want to add 20 more values to each existing field for the existing structure A.

Thanks.

Benson

[dpb]

Oh, ok.

Use either setfield() or the dot notation referencing the desired field. NB: you can reference fields via variables via parentheses syntax such as

S.X=randi(10,4,1);                  % create dummy struct
vn='X';                             % variable containing field name
S.(vn)=[S.(vn); randi(23,12,1)];    % add another dozen elements

Remember you can also get the struct fieldnames programmatically so don't have to write explicit strings as above with

>> vn=fieldnames(S)
vn =
  1×1 cell array
    {'X'}
>> 

Answer 1

[Max Heiken]

A.existingField = [A.existingField; newValues];

[Max Heiken]

or refer to this question