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function [c,ceq] = expensive_confun(x) %EXPENSIVE_CONFUN An expensive constraint function used in optimparfor example. % Copyright 2007-2013 The MathWorks, Inc. % Simulate an expensive function by pausing pause(0.1); % Evaluate constraints c = [1.5 + x(1)*x(2)*x(3) - x(1) - x(2) - x(4); -x(1)*x(2) + x(4) - 10]; % No nonlinear equality constraints: ceq = [];