MATLAB: How to create an empty array of structs

arrayemptyMATLABstructure

I would like to make a loop that accumulates an array of structures, such as
array=struct([]); % The docs imply that this should work
for i=1:n
st=CreateAStruct(i);
array(i)=st;
end;
But…this doesn't work, I get the error, "Subscripted assignment between dissimilar structures." on the first pass through the loop. Instead the only way I've found to do this is the following.
 for i=1:n
  st=CreateAStruct(i);
  if i==1
    array=st;
  else
    array(i)=st;
  end;
end;
Is there a nicer way to do this?

Best Answer

You are correct, struct() is a struct with no fields, and that is a distinct structure that is not the same as a structure with any defined fields.
Workaround:
T = arrayfun(@(K) CreateAsStruct(K), 1:n, 'UniformOutput',0);
array = horzcat(T{:});
clear T
Also, if I recall correctly, there is a MATLAB File Exchange contribution to do assignment between dissimilar structures.
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