logical; shall the original NLopt info been shown.

control

list of options, see nl.opts for help.

...

additional arguments passed to the function.

Value

List with components:

par

the optimal solution found so far.

value

the function value corresponding to par.

iter

number of (outer) iterations, see maxeval.

convergence

integer code indicating successful completion (> 0)
or a possible error number (< 0).

message

character string produced by NLopt and giving additional
information.

Details

This is an algorithm derived from the BOBYQA Fortran subroutine of Powell,
converted to C and modified for the NLOPT stopping criteria.

References

M. J. D. Powell. ``The BOBYQA algorithm for bound constrained
optimization without derivatives,'' Department of Applied Mathematics and
Theoretical Physics, Cambridge England, technical reportNA2009/06 (2009).