fmincon nonlinear constraints

when using fmincon, can you only have one nonlinear constraint for "c".

I am doing an optimization that requires analysis on both deflection (Da - D <= 0) and bending stress (sig - siga <= 0). Can I go ahead and just have:

function [def,bend,ceq] = mycon(x) % called in fmincon function def = ... bend = ... ceq = [] end

that will take both of those constraints into account, or do I somehow have to combine them? Any help would be appreciated. Thanks

[Laurens Bakker]

Which version of MATLAB are you using? I'm asking because in the most recent version, the function that encapsulates the non-linear constraints should only have 2 returns: [c,ceq]

Answer 1

[Sean de Wolski]

If you concatenate them, C could contain both constraint matrices?