/// <summary>
/// Gets the probability of a sequence starting with the <paramref name="left"/>
/// hypothesis and ending with the <paramref name="right"/> one.
/// </summary>
/// <param name="left">The left state as seen with the observation.</param>
/// <param name="right">The right state as seen with the observation.</param>
/// <returns>System.Double.</returns>
public double GetProbability(
LabeledObservation left,
LabeledObservation right)
{
#if true
var p = _inital.GetProbability(left.State) *
_emission.GetEmission(left) *
_transition.GetTransition(left.State, right.State) *
_emission.GetEmission(right);
#else
// using Log-Likelihoods
var p = Math.Exp(Math.Log(_inital.GetProbability(left.State)) +
Math.Log(_emission.GetEmission(left)) +
Math.Log(_transition.GetTransition(left.State, right.State)) +
Math.Log(_emission.GetEmission(right)));
if (Double.IsInfinity(p))
{
return(0);
}
#endif
return(p);
}
public double Generate(LabeledObservation pair)
{
return(GetEmission(pair));
}
/// <summary>
/// Determines whether the specified <see cref="LabeledObservation" /> is equal to this instance.
/// </summary>
/// <param name="other">Another object to compare to.</param>
/// <returns><see langword="true" /> if the specified <see cref="LabeledObservation" /> is equal to this instance; otherwise, <see langword="false" />.</returns>
public bool Equals(LabeledObservation other)
{
return(State.Equals(other.State) && Observation.Equals(other.Observation));
}
public double GetEmission(LabeledObservation pair)
{
return(GetEmission(pair.State, pair.Observation));
}
