To set these directives, assign a string specifying their values to the AMPL option tron_options
. For example:
ampl: option tron_options 'itermax=100 gtol=1.0e-8';
Directives:
itermax the limit on the number of conjugate gradient iterations. maxfev the limit on the number of function evaluations fatol the absolute error desired in the function frtol the relative error desired in the function fmin a lower bound for the function cgtol convergence criteria for the conjugate gradient method gtol relative 2-norm of projected grdients; convergence criteria for the trust region method