// Use this for initialization
void Start()
{
m_device = DeviceDescriptor.UseDefaultDevice();
print($"Hello from CNTK for {m_device.Type} only!");
m_allRewards = new List <float>(EpisodeCount);
m_environment = new DQN.Environment();
var stateSize = m_environment.GetStateSize();
var actionSize = m_environment.GetActionSize();
m_agent = new Agent(stateSize, actionSize, LayerSize);
m_currentCoroutine = StartCoroutine(Play(m_agent, m_environment, EpisodeCount, MinEpsillon, true)); //training
}
IEnumerator Play(Agent agent, DQN.Environment env, int episodeCount = 100, float minEpsillon = 0.05f, bool isTraining = true)
{
var actionSize = env.GetActionSize();
var epsillon = isTraining ? 1.0f : minEpsillon;
var rewardQueue = new Queue <float>(100);
for (int epi = 0; epi < episodeCount; ++epi)
{
env.Reset();
if (isTraining)
{
epsillon = Mathf.Max(minEpsillon, 1.0f - (float)Math.Pow((float)epi / episodeCount, 2.0f));
}
float episodeReward = 0.0f;
var currentState = Array.ConvertAll <int, float>(env.GetCurrentState(), x => Convert.ToSingle(x));
List <int> actions = new List <int>(MaxSteps);
int t = 0;
for (t = 0; t < MaxSteps; t++)
{
//debug!
if (t == 0 && (epi % 500 == 0))
{
foreach (var q in agent.GetLocalQValues(currentState, m_device))
{
print("QVAL: " + epi + " " + q);
}
}
var action = agent.Act(currentState, epsillon, actionSize, m_device, !isTraining);
actions.Add(action);
float reward = 0.0f;
bool isFinished = env.Act((DQN.Environment.Actions)action, out reward);
episodeReward += reward;
var nextState = Array.ConvertAll <int, float>(env.GetCurrentState(), x => Convert.ToSingle(x));
if (isTraining)
{
agent.Observe(currentState, (float)action, reward, nextState, isFinished ? 1.0f : 0.0f);
agent.Train(BatchSize, Gamma, m_device);
}
if (isFinished)
{
break;
}
currentState = nextState;
}
if (isTraining)
{
if (epi > BatchSize)
{
m_allRewards.Add((float)agent.GetTrainingLoss());
if (graphScript != null)
{
graphScript.ShowGraph(m_allRewards);
}
}
if ((epi + 1) % EpisodesPerTransfer == 0)
{
agent.TransferLearning(m_device);
}
}
rewardQueue.Enqueue((float)episodeReward);
if ((epi + 1) % PrintInterval == 0)
{
float rewardAvg = 0.0f;
while (rewardQueue.Count > 0)
{
rewardAvg += rewardQueue.Dequeue();
}
rewardAvg /= PrintInterval;
print("Reward: " + (epi + 1) + " " + rewardAvg + " " + isTraining);
//print("Loss: " + agent.GetTrainingLoss());
}
//print("Episode: " + epi);
yield return(null);
}
m_currentCoroutine = null;
m_coroutineCount++;
}