question: @ Override public double [ ] sample ( ) { double sampled = sampler . nextFloat ( ) ; double sum = 0.0 ; for ( double [ ] point : points . keySet ( ) ) { sum += points . get ( point ) ; if ( sampled < sum ) { return point ; } } log . warning ( "discrete density function could not be sampled" ) ; return new double [ 0 ] ; }
target:  Samples according to the density function