gamultiobj optimization with nonlinear constraints bigger than

I know nonlinear inequality constraints have the form c(x) ≤ 0. Which means they optimize samller (or equal) values.

I'm optimizing a multi-objective function, where some constraints are required to be bigger (or between) than certain values, rather than smaller.

Is there a way to do it?

Answer 1

[Walter Roberson]

function [c, ceq] = nonlcon(x)
  c = [x(1), x(2), -x(3), -x(4)];
  ceq = [];

The above code implements x(1) <= 0, x(2) <= 0, x(3) >= 0, x(4) >= 0

To implement P <= x(1) <= Q you would use

[P - x(1), x(1) - Q]

[dralp]

Thanks a lot