public void TanhPrimeTest()
{
var a = new Matrix(2, 2);
a.InRandomize();
var b = a.Duplicate();
a = new Tanh().Backward(a);
b.InMap((x) => 1 - Math.Pow((Math.Exp(x) - Math.Exp(-x)) / (Math.Exp(x) + Math.Exp(-x)), 2));
Assert.IsTrue(Math.Abs(a.FrobeniusNorm() - b.FrobeniusNorm()) < 0.1, new Tanh().Type().ToString() + " Derivative.");
}
public void TanhTest()
{
var a = new Matrix(2, 2);
a.InRandomize();
var b = a.Duplicate();
a = new Tanh().Forward(a);
b.InMap((x) => (Math.Exp(x) - Math.Exp(-x)) / (Math.Exp(x) + Math.Exp(-x)));
Assert.IsTrue(Math.Abs(a.FrobeniusNorm() - b.FrobeniusNorm()) < 0.1, new Tanh().Type().ToString() + " Activation.");
}