public override distributions.Distribution expand(long[] batch_shape, distributions.Distribution instance = null)
{
if (instance != null && !(instance is Gamma))
{
throw new ArgumentException("expand(): 'instance' must be a Chi2 distribution");
}
if (instance == null)
{
instance = new Chi2(concentration);
}
return(base.expand(batch_shape, instance));
}
public void TestChi2()
{
double[] x = NP.Arange(0, 10);
double[] y = NP.Broadcast((xx) => 2 * xx + 3, x);
PDF linear = (v) => v[0] * v[1] + v[2];
Chi2 x2 = new Chi2(linear, x, y);
double[] tmp = { 2, 3 };
Assert.AreEqual(0.0, x2.Compute(tmp));
double[] tmp2 = { 2, 4 };
Assert.AreEqual(10.0, x2.Compute(tmp2));
}
