public void setKappa ( double kappa ) { if ( kappa < 0.5 || kappa > 1.0 || Double . isNaN ( kappa ) ) throw new IllegalArgumentException ( "Kapp must be in [0.5, 1], not " + kappa ) ; this . kappa = kappa ; }
The forgetfulness factor in the learning rate . Larger values increase the rate at which old information is forgotten