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

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

[Stephen23]

Are you getting any error messages? If so, what ones? Can you please tell us what your code does when you try to run it.

[cemsi888]

    % assignin('base',messung{1},g);
      evalin('base',erg,'erg.messung{1}') 

 error:undefined function or variable erg

ı have to reach output of the assignin function and then i can concentrate in erg.but how can i do this ı have not any idea

[Stephen23]

Please give the complete error message. This means all of the red text.

[cemsi888]

Undefined function or variable 'erg'.

[Stephen23]

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]

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

Answer 1

[Titus Edelhofer]

Hi,

if I understand correctly, you are looking for dynamic field names:

   S.(messung{1}) = messung{1};

Titus