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

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Manuel Arcangeletti
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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回答（1 个）

Sergey Kasyanov
Sergey Kasyanov 2018-4-10
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

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