public override string ToString()
{
base.ToString();
winners.Name = Name + " Winners";
losers.Name = Name + " Losers";
return(base.ToString() +
winners.Count.ToString("N0") + " winners. " +
losers.Count.ToString("N0") + " losers. " +
WinRate.ToString("P2") + " win ratio. " +
ProfitFactor.ToString("N2") + " profit factor.\n" +
Expectancy.ToString("N2") + " expectancy.\n" +
winners.ToString() +
losers.ToString());
}
public Expectancy ComputeExpectancy()
{
Expectancy expectancy = new Expectancy
{
Owner = this,
valence = Expectancy.Valence.Reward,
change = Expectancy.Change.AsExpected,
salience = 0
};
if (_values.Count <= 1 || _predictions.Count == 0)
{
return(expectancy);
}
float prediction = _predictions.Last(),
value = _values.Last(),
lastValue = _values[_values.Count - 2];
float expectedResult = prediction - lastValue;
// if expectedResult < 0 then we expect punishment
// if expectedResult >= 0 then we expect reward
expectancy.valence = expectedResult < 0 ? Expectancy.Valence.Punishment : Expectancy.Valence.Reward;
float sensedResult = value - lastValue;
// if sensedResult < 0 then we sensed punishment
// if sensedResult >= 0 then we sensed reward
if (MathUtils.DeltaAbs(expectedResult, sensedResult) < Epsilon)
{
expectancy.change = Expectancy.Change.AsExpected;
}
else
{
expectancy.change = sensedResult < expectedResult
? Expectancy.Change.WorseThanExpected
: Expectancy.Change.BetterThanExpected;
}
expectancy.salience = MathUtils.Exogenous(value, prediction);
return(expectancy);
}
