How to use

org.ddogleg.optimization.quasinewton.LineSearchFletcher86

constructor

/**
 * Returns an implementation of {@link QuasiNewtonBFGS} with {@link LineSearchMore94} for the internal line search.
 * This is a specific implementation of {@link UnconstrainedMinimization} and allows full access to all
 * tuning parameters.
 *
 * @return UnconstrainedMinimization
 */
public static QuasiNewtonBFGS_to_UnconstrainedMinimization quasiNewtonBfgs(@Nullable ConfigQuasiNewton config ) {
  if( config == null )
    config = new ConfigQuasiNewton();
  LineSearch lineSearch;
  switch( config.lineSearch ) {
    case FLETCHER86:
      LineSearchFletcher86 fletcher86 = new LineSearchFletcher86();
      fletcher86.setConvergence(config.line_ftol,config.line_gtol);
      lineSearch = fletcher86;
      break;
    case MORE94:
      LineSearchMore94 more94 = new LineSearchMore94();
      more94.setConvergence(config.line_ftol,config.line_gtol,0.1);
      lineSearch = more94;
      break;
    default:
      throw new RuntimeException("Unknown line search. "+config.lineSearch);
  }
  QuasiNewtonBFGS qn = new QuasiNewtonBFGS(lineSearch);
  return new QuasiNewtonBFGS_to_UnconstrainedMinimization(qn);
}

/**
 * Returns an implementation of {@link QuasiNewtonBFGS} with {@link LineSearchMore94} for the internal line search.
 * This is a specific implementation of {@link UnconstrainedMinimization} and allows full access to all
 * tuning parameters.
 *
 * @return UnconstrainedMinimization
 */
public static QuasiNewtonBFGS_to_UnconstrainedMinimization quasiNewtonBfgs(@Nullable ConfigQuasiNewton config ) {
  if( config == null )
    config = new ConfigQuasiNewton();
  LineSearch lineSearch;
  switch( config.lineSearch ) {
    case FLETCHER86:
      LineSearchFletcher86 fletcher86 = new LineSearchFletcher86();
      fletcher86.setConvergence(config.line_ftol,config.line_gtol);
      lineSearch = fletcher86;
      break;
    case MORE94:
      LineSearchMore94 more94 = new LineSearchMore94();
      more94.setConvergence(config.line_ftol,config.line_gtol,0.1);
      lineSearch = more94;
      break;
    default:
      throw new RuntimeException("Unknown line search. "+config.lineSearch);
  }
  QuasiNewtonBFGS qn = new QuasiNewtonBFGS(lineSearch);
  return new QuasiNewtonBFGS_to_UnconstrainedMinimization(qn);
}

LineSearchFletcher86 alg = new LineSearchFletcher86(9,0.1,0.5);
alg.setConvergence(0.1,0.9);
alg.setFunction(new Individual_to_CoupledDerivative(f,d),0);
alg = new LineSearchFletcher86(9,0.05,0.5);
alg.setConvergence(1e-5,0.1);
alg.setFunction(new Individual_to_CoupledDerivative(f,d),0);