How to preview the fields of a struct array and to select just some of them.

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Manuel Arcangeletti 2018-4-10

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https://ww2.mathworks.cn/matlabcentral/answers/393912-how-to-preview-the-fields-of-a-struct-array-and-to-select-just-some-of-them

回答： Sergey Kasyanov 2018-4-10

Hello, I have a struct array with a variable number of fields. In each field is stored a set of data. I'm trying to write a routine that let the user to select some of the fields in the array and then make the desired analysis on that fields.

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Answer 1

Sergey Kasyanov 2018-4-10

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Hi.

You can get list of fields of structure by filednames and adress to any field by that feature.

Way which you can realize interacting with a cell array with field names may vary in wide range. I suggest that you have a cell array with some strings which is your goal field names. Then:

%origin data is A and B
A={'FirstField','SecondField'};
B=struct('FirstField',Data1,...
'SecondField',Data2,...
'ThirdField',Data3);
%get field names of B
fn=fieldnames(B);
%extract data from struct
for i=1:length(A)
  %check existing if A{i} field in B
    if isfield(B,A{i})
      %extract data from B
      Data{i}=B.(A{i});
    end
end