ConstrainedOptPack: C++ Tools for Constrained (and Unconstrained) Optimization Version of the Day
ConstrainedOptPack_MeritFuncNLESqrResid.cpp
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00004 // Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
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00041 
00042 #include "ConstrainedOptPack_MeritFuncNLESqrResid.hpp"
00043 #include "AbstractLinAlgPack_LinAlgOpPack.hpp"
00044 
00045 namespace ConstrainedOptPack {
00046 
00047 MeritFuncNLESqrResid::MeritFuncNLESqrResid()
00048   : deriv_(0.0)
00049 {}
00050 
00051 value_type MeritFuncNLESqrResid::calc_deriv( const Vector& c_k )
00052 {
00053   using LinAlgOpPack::dot;
00054   return deriv_ = - dot(c_k,c_k);
00055 }
00056 
00057 // Overridden from MeritFuncNLP
00058 
00059 value_type MeritFuncNLESqrResid::value(const Vector& c) const
00060 {
00061   using LinAlgOpPack::dot;
00062   return 0.5 * dot(c,c);
00063 }
00064 
00065 value_type MeritFuncNLESqrResid::deriv() const
00066 {
00067   return deriv_;
00068 }
00069 
00070 void MeritFuncNLESqrResid::print_merit_func(std::ostream& out
00071   , const std::string& L ) const
00072 {
00073   out
00074     << L << "*** Define a square of constraint residuals merit funciton\n"
00075     << L << "*** (assumes Gc_k'*d_k + c_k = 0):\n"
00076     << L << "phi(c) = 1/2 * dot(c,c)\n"
00077     << L << "Dphi(x_k,d_k) = - dot(c_k,c_k)\n";
00078 }
00079 
00080 } // end namespace ConstrainedOptPack 
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