nag_glopt_bnd_pso (e05sac) Example Program Results
Minimization of the Schwefel function.
Default Option Queries:
Boundary : FLOATING
Maximum Iterations Completed : 1000 DEFAULT
Distance Tolerance : 0.0001
1. Solution without using coupled local minimizer.
(User-supplied callback objfun_schwefel, first invocation.)
(User-supplied callback monmod, first invocation.)
Algorithm Statistics
--------------------
Total complete iterations : 395
Complete iterations since improvement : 152
Total particles converged to xb : 2
Total improvements to global optimum : 59
Total function evaluations : 2773
Total particles re-initialized : 2
Solution Status : Maximum static iterations attained
Known objective optimum : -837.96577
Achieved objective value : -837.96567
Comparison between the known optimum and the achieved solution.
x_target xb
1 -420.97 -420.95
2 -420.97 -420.94
2. Solution using coupled local minimizer nag_opt_simplex_easy (e04cbc).
Algorithm Statistics
--------------------
Total complete iterations : 51
Complete iterations since improvement : 1
Total particles converged to xb : 0
Total improvements to global optimum : 12
Total function evaluations : 537
Total particles re-initialized : 0
Solution Status : Target value achieved
Known objective optimum : -837.96577
Achieved objective value : -837.96577
Comparison between the known optimum and the achieved solution.
x_target xb
1 -420.97 -420.97
2 -420.97 -420.97
3. Solution using coupled local minimizer nag_opt_conj_grad (e04dgc).
Algorithm Statistics
--------------------
Total complete iterations : 123
Complete iterations since improvement : 1
Total particles converged to xb : 0
Total improvements to global optimum : 10
Total function evaluations : 898
Total particles re-initialized : 0
Solution Status : Target value achieved
Known objective optimum : -837.96577
Achieved objective value : -837.96568
Comparison between the known optimum and the achieved solution.
x_target xb
1 -420.97 -420.95
2 -420.97 -420.95