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function st = aos2soa(starray)
%
% st=aos2soa(starray)
%
% Convert an array-of-structs (AoS) to a struct-of-arrays (SoA)
%
% author: Qianqian Fang (q.fang <at> neu.edu)
%
% input:
% starray: a struct array, with each subfield a simple scalar
%
% output:
% str: a struct, containing the same number of subfields as starray
% with each subfield a horizontal-concatenation of the struct
% array subfield values.
%
% example:
% a=struct('a',1,'b','0','c',[1,3]');
% st=aos2soa(repmat(a,1,10))
%
% this file is part of JSNIRF specification: https://github.com/NeuroJSON/jsnirf
%
% License: GPLv3 or Apache 2.0, see https://github.com/NeuroJSON/jsnirf for details
%
if (nargin < 1 || ~isstruct(starray))
error('you must give an array of struct');
end
if (numel(starray) == 1)
st = starray;
return
end
st = struct;
fn = fieldnames(starray);
for i = 1:length(fn)
st.(fn{i}) = [starray(:).(fn{i})];
end
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