MATLAB: Reference a structure array

MATLABstructure array

Hello
My question is simple.
can I reference a structure array; i.e if I have this code
   s = struct('f1', [1 2; 3 4], 'f2', [5 6; 7 8]);
if I have for loop to find do some operation on the matrices stored in f1 & f2 like the mean for example. how can I index f1 & f2 in structure s so each time I can call one in the loop??

Best Answer

You can use the fieldnames function and then use parentheses around the fieldname when called with a variable, see the code below:
s = struct('f1', [1 2; 3 4], 'f2', [5 6; 7 8]);
fn = fieldnames(s)
for idx = 1:length(fn)
  mv(idx) = mean(s.(fn{idx})(:));
end
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