% with the following function non linear constraints can be defined% the name of the function is nlc_eng (non linear constraints_english)% the function (m-file) must be saved in the current directoryfunction [c,ceq]=nlc_eng(x)% c is the expression of the nonlinear inequality constraints% with more then 1 constraints create a new row with ;% if the constraint is not present write c=[]%%c=[];c=[x(2)^2+5*x(1)^2-8];% ceq is the expression of the nonlinear equality constraints% with more then 1 constraint create a new row with ;% if the constraint is not present write ceq=[]ceq=[x(2)-2*x(1)^4];