| public VonMisesFisherDistribution ( double mean, double concentration ) : System | ||
| mean | double | The mean direction vector (with unit length). |
| concentration | double | The concentration value κ (kappa). |
| return | System | |
public VonMisesFisherDistribution(double[] mean, double concentration)
: base(mean.Length)
{
if (concentration < 0)
throw new ArgumentOutOfRangeException("concentration", "Concentration parameter kappa must be non-negative.");
if (!Norm.Euclidean(mean).IsEqual(1, 1e-10))
throw new ArgumentOutOfRangeException("mean", "The mean vector must have unit length.");
this.mean = mean;
this.kappa = concentration;
int p = Dimension;
double num = Math.Pow(concentration, p / 2 - 1);
double den = Math.Pow(2 * Math.PI, p / 2) * Bessel.I(p / 2 - 1, concentration);
this.constant = num / den;
}
| VonMisesFisherDistribution::VonMisesFisherDistribution ( int dimension ) : System | |
| VonMisesFisherDistribution::VonMisesFisherDistribution ( int dimension, double concentration ) : System |
