Prints a description of the status codes from the nloptr optimization routine.
No return value; prints a summary of the
nloptr status codes to
statusCodes() #> Status codes: #> 1: Generic success return value. #> 2: Optimization stopped because stopval was reached. #> 3: Optimization stopped because ftol_rel or ftol_abs was reached. #> 4: Optimization stopped because xtol_rel or xtol_abs was reached. #> 5: Optimization stopped because maxeval was reached. #> 6: Optimization stopped because maxtime was reached. #> -1: Generic failure code. #> -2: Invalid arguments (e.g. lower bounds are bigger than upper bounds, an unknown algorithm was specified, etc.). #> -3: Ran out of memory. #> -4: Halted because roundoff errors limited progress. (In this case, the optimization still typically returns a useful result.) #> -5: Halted because of a forced termination: the user called nlopt_force_stop(opt) on the optimization's nlopt_opt object opt from the user's objective function or constraints.