final double[] position = new double[ n ];
for ( int d = 0; d < n; ++d )
position[ d ] = rnd.nextDouble();
final RealPoint realPoint = new RealPoint( position );
final DoubleType sample = new DoubleType( rnd.nextDouble() );
realPointList.add( realPoint );
sampleList.add( sample );
realPointSampleList.add( realPoint, sample );
}