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Make Structures Persistent

To make structures persist, you define them to be persistent variables and initialize them with the isempty statement, as described in Define and Initialize Persistent Variables.

For example, the following function defines structure X to be persistent and initializes its fields a and b:

function f(u)  %#codegen
persistent X

if isempty(X)
   X.a = 1;
   X.b = 2;
end
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