How do I access structure fields dynamically?

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Try dynamic field reference where you put a string in the parenthesis as seen on the line defining stuff.

S = struct('A', [1 2], 'B',[3 4 5]); 
SNames = fieldnames(S); 
for loopIndex = 1:numel(SNames) 
    stuff = S.(SNames{loopIndex})
end

I concur with Steve and Adam. Use cells. This syntax is right for people in other situations though!

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