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How to to create combined structure array with dynamic defined variable name?

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cemsi888
cemsi888 on 17 Jun 2016
Answered: Titus Edelhofer on 17 Jun 2016
Hi i used dynamic variable name to create structures. it works really good. after that i would like insert my measurement results(which are double arrays in to this structure) i mean
messung{i}.g (messung{i}=character)
it works really good with assignin too. What i did is:
% for i=1:length(handles.data)
aktuelpos=handles.data(i)
%set(handles.listbox1,'String',handles.data);
messung{i}=sprintf('P_%u_%u',handles.Posen.Position(i),handles.Posen.posen(i));
end
% assignin('base',messung{i},g)
Now i would like to concentrate created structure array in other array. Target: S.messung{i} The problem is messung{i} is a character array and messung{i}.a etc does not work unfortunately. I used eval too but i did not create below defined structure form.
% eval(['S.messung{1}', =messung{1}'])
Could u please help me? best regards

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Stephen Cobeldick
Stephen Cobeldick on 17 Jun 2016
Aaah, what an informative error message. Of course that is what you get when you choose buggy and slow operators like eval and assignin. What you have a perfect example of why using these commands is such a bad idea (no matter how much beginners love using them): obfuscated, unclear code, buggy, cryptic, hard to debug.
You could either:
  1. learn why these commands are slow and buggy, and replace them with more reliable methods of passing data around, or
  2. try to get them working.
Which would you prefer?
cemsi888
cemsi888 on 17 Jun 2016
2 i solve my problem
% eval(sprintf('S.%s = 4',meinmappe{1}));
ı know eval is really slow function but another solution i could not find. anyway thanx

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Answers (1)

Titus Edelhofer
Titus Edelhofer on 17 Jun 2016
Hi,
if I understand correctly, you are looking for dynamic field names:
S.(messung{1}) = messung{1};
Titus

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