public MarketReport(BazaarBot bazaar)
{
_commodities = new List <string> {
"R: " + bazaar.TotalRounds.ToString()
};
var rounds = 1;
foreach (var commodity in bazaar.CommodityClasses)
{
_commodities.Add(commodity);
_commodityPrices.Add(bazaar.GetPriceAverage(commodity, rounds).ToString("N2"));
_commodityAsks.Add(bazaar.GetAskAverage(commodity, rounds).ToString());
_commodityBids.Add(bazaar.GetBidAverage(commodity, rounds).ToString());
_commodityTrades.Add(bazaar.GetTradeAverage(commodity, rounds).ToString());
_commodityProduction.Add(BazaarBot.Production.ContainsKey(commodity) ? BazaarBot.Production[commodity].ToString() : string.Empty);
}
foreach (var agentKey in bazaar.AgentClasses.Keys)
{
_agents.Add(agentKey);
_agentProfit.Add(bazaar.GetProfitAverage(agentKey, rounds).ToString("N2"));
var agents = bazaar.Agents.Where(p => p.ClassId == agentKey);
_agentCount.Add(agents.Count().ToString("N0"));
_agentMoney.Add(BazaarBot.Average(agents.Select(p => p.Money)).ToString("N0"));
var inventory = Enumerable.Repeat(0f, bazaar.CommodityClasses.Count).ToArray();
foreach (var a in agents)
{
for (int i = 0; i < bazaar.CommodityClasses.Count; i++)
{
inventory[i] += a.QueryInventory(bazaar.CommodityClasses[i]);
}
}
_inventory.AddRange(inventory.Select(p => (p > 0 ? p / agents.Count() : 0)));
}
}
public void update_price_model(BazaarBot bazaar, string act, string commodity, bool success, float unit_price_ = 0)
{
if (success)
{
//Add this to my list of observed trades
var observed_trades = _observedTradingRange[commodity];
observed_trades.Add(unit_price_);
}
var public_mean_price = bazaar.GetPriceAverage(commodity, 1);
var belief = _priceBeliefs[commodity];
var mean = (belief.X + belief.Y) / 2;
var wobble = 0.05;
var delta_to_mean = mean - public_mean_price;
if (success)
{
if (act == "buy" && delta_to_mean > SIGNIFICANT)
{ //overpaid
belief.X -= delta_to_mean / 2; //SHIFT towards mean
belief.Y -= delta_to_mean / 2;
}
else if (act == "sell" && delta_to_mean < -SIGNIFICANT)
{ //undersold
belief.X -= delta_to_mean / 2; //SHIFT towards mean
belief.Y -= delta_to_mean / 2;
}
belief.X += (float)wobble * mean; //increase the belief's certainty
belief.Y -= (float)wobble * mean;
}
else
{
belief.X -= delta_to_mean / 2; //SHIFT towards the mean
belief.Y -= delta_to_mean / 2;
var special_case = false;
var stocks = QueryInventory(commodity);
var ideal = Inventory.Ideal(commodity);
if (act == "buy" && stocks < LOW_INVENTORY * ideal)
{
//very low on inventory AND can't buy
wobble *= 2; //bid more liberally
special_case = true;
}
else if (act == "sell" && stocks > HIGH_INVENTORY * ideal)
{
//very high on inventory AND can't sell
wobble *= 2; //ask more liberally
special_case = true;
}
if (!special_case)
{
//Don't know what else to do? Check supply vs. demand
var asks = bazaar.GetAskAverage(commodity, 1);
var bids = bazaar.GetBidAverage(commodity, 1);
//supply_vs_demand: 0=balance, 1=all supply, -1=all demand
var supply_vs_demand = (asks - bids) / (asks + bids);
//too much supply, or too much demand
if (supply_vs_demand > SIG_IMBALANCE || supply_vs_demand < -SIG_IMBALANCE)
{
//too much supply: lower price
//too much demand: raise price
var new_mean = public_mean_price * (1 - supply_vs_demand);
delta_to_mean = mean - new_mean;
belief.X -= delta_to_mean / 2; //SHIFT towards anticipated new mean
belief.Y -= delta_to_mean / 2;
}
}
belief.X -= (float)wobble * mean; //decrease the belief's certainty
belief.Y += (float)wobble * mean;
}
if (belief.X < MIN_PRICE)
{
belief.X = MIN_PRICE;
}
if (belief.Y < MIN_PRICE)
{
belief.Y = MIN_PRICE;
}
if (belief.Y > MAX_PRICE)
{
belief.Y = MAX_PRICE;
}
if (belief.X > MAX_PRICE)
{
belief.X = MAX_PRICE;
}
}
