/// <summary>
/// Generates a random observation from the current distribution.
/// </summary>
///
/// <returns>A random observations drawn from this distribution.</returns>
///
public override double Generate()
{
// Choose one coefficient at random
int c = GeneralDiscreteDistribution.Random(coefficients);
// Sample from the chosen coefficient
var d = components[c] as ISampleableDistribution <double>;
if (d == null)
{
throw new InvalidOperationException();
}
return(d.Generate());
}