public Sampler(Log.Descriptor descriptor)
{
m_descriptor = descriptor;
State = new double[descriptor.StateVariables.Count];
Action = new double[descriptor.ActionVariables.Count];
State_p = new double[descriptor.StateVariables.Count];
Reward = new double[descriptor.RewardVariables.Count];
}
static void Main(string[] args)
{
//Parse the input arguments
const string inputFolderArg = "dir=";
const string numSamplesArg = "num-samples=";
const string outputFileArg = "output-file=";
string inputFolder = null;
int numSamples = 0;
string outputFilename = null;
string outputBinaryFilename = null;
foreach (string arg in args)
{
if (arg.StartsWith(inputFolderArg))
{
inputFolder = arg.Substring(inputFolderArg.Length);
}
if (arg.StartsWith(numSamplesArg))
{
numSamples = int.Parse(arg.Substring(numSamplesArg.Length));
}
if (arg.StartsWith(outputFileArg))
{
outputFilename = arg.Substring(outputFileArg.Length);
}
}
//check all required arguments are set
if (inputFolder == null || numSamples == 0 || outputFilename == null)
{
Console.WriteLine("ERROR. Usage: SimionLogToOfflineTraining " + inputFolderArg + "<dir> " + numSamplesArg + "<numTuples> " + outputFileArg + "<outputFile>");
return;
}
//check/set correct file extensions to output files
if (!outputFilename.EndsWith(Extensions.SampleFileDescriptor))
{
outputFilename += Extensions.SampleFileDescriptor;
}
outputBinaryFilename = Herd.Utils.RemoveExtension(outputFilename, 2) + Extensions.SampleBinaryFile;
//Traverse all the log files
string[] logDescriptorFiles = Directory.GetFiles(inputFolder, "*" + Herd.Files.Extensions.LogDescriptor, SearchOption.AllDirectories);
int numFiles = logDescriptorFiles.Length;
if (numFiles == 0)
{
Console.WriteLine("ERROR. No log files found in the provided directory: " + inputFolder);
return;
}
int numDesiredSamplesPerFile = numSamples / numFiles;
//We use the first descriptor as the common descriptor used for tuples. We are assuming they all have the same variables. BEWARE!!
Log.Descriptor commonDescriptor = new Log.Descriptor(logDescriptorFiles[0]);
Sampler sampler = new Sampler(commonDescriptor);
int numSavedSamples = 0;
using (FileStream outputStream = File.Create(outputBinaryFilename))
{
BinaryWriter writer = new BinaryWriter(outputStream);
Console.WriteLine("STARTED: Drawing " + numSamples + " samples from log files in folder " + inputFolder);
foreach (string logDescriptorFilename in logDescriptorFiles)
{
Log.Descriptor logDescriptor = new Log.Descriptor(logDescriptorFilename);
string folder = Path.GetDirectoryName(logDescriptorFilename);
Log.Data data = new Log.Data();
data.Load(folder + "\\" + logDescriptor.BinaryLogFile);
if (data.SuccessfulLoad)
{
if (sampler.State.Length + sampler.Action.Length + sampler.Reward.Length ==
logDescriptor.StateVariables.Count + logDescriptor.ActionVariables.Count + logDescriptor.RewardVariables.Count)
{
int totalNumSamples = GetTotalNumSamples(data);
int actualNumSamples = Math.Min(totalNumSamples - 1, numDesiredSamplesPerFile);
double percentSampled = 100 * ((double)actualNumSamples / (double)totalNumSamples);
Console.Write("Log file " + Path.GetFileName(logDescriptorFilename) + ":");
for (int i = 0; i < actualNumSamples; i++)
{
if (sampler.DrawRandomSample(data))
{
sampler.SaveLastSampleToBinaryFile(writer);
numSavedSamples++;
}
}
Console.WriteLine(string.Format(" sampled ({0:0.00}%)", percentSampled));
}
else
{
Console.WriteLine("File " + logDescriptorFilename + "skipped (missmatched variables in log)");
}
}
}
}
//Shuffle the samples in the file
Console.WriteLine("Shuffling samples in file");
ShuffleSamplesInFile(outputBinaryFilename, sampler);
//Save the descriptor
if (numSavedSamples > 0)
{
sampler.SaveSampleFileDescriptor(outputFilename, Path.GetFileName(outputBinaryFilename), numSavedSamples);
Console.WriteLine("FINISHED: " + numSavedSamples + " samples were drawn from the log files and saved\nDescriptor: " + outputFilename + "\nBinary data: " + outputBinaryFilename);
}
}