private static double buildHistograms(InputParser inputParser, HistogramComputer histogramComputer,
KnuthPosteriorComputer knuthPosteriorComputer, string filename, int spaceDimension, int pointNO,
double[] minElems, double[] maxElems, int serverNO, int upperBoundOfPostVals,
double[] posteriorValues, double[] centralDiffs, int initialHistRes, List<DataRow> data)
{
double posteriorSum = 0.0;
for (int histogramResolution = initialHistRes; histogramResolution <= upperBoundOfPostVals;
histogramResolution++)
{
int[] binHefts = histogramComputer.buildHistogram(histogramResolution, data, spaceDimension,
minElems, maxElems);
posteriorSum = innerBuildHistograms(inputParser, knuthPosteriorComputer, filename, spaceDimension,
pointNO, serverNO, upperBoundOfPostVals, posteriorValues, centralDiffs, initialHistRes, posteriorSum,
histogramResolution, binHefts);
}
return posteriorSum;
}
private static double buildHistogramsStreamMode(InputParser inputParser, HistogramComputer histogramComputer,
KnuthPosteriorComputer knuthPosteriorComputer, string filename, int spaceDimension, int pointNO,
double[] minElems, double[] maxElems, int serverNO, int upperBoundOfPostVals,
double[] posteriorValues, double[] centralDiffs, int initialHistRes)
{
double posteriorSum = 0.0;
for (int histogramResolution = initialHistRes; histogramResolution <= upperBoundOfPostVals;
histogramResolution++)
{
int[] binHefts = new int[(int)Math.Pow(histogramResolution, spaceDimension)];
var lines = File.ReadLines(filename);
int lineIdx = 0;
foreach (var line in lines)
{
string[] lineParts = line.Split(InputParser.delimiter);
if (lineParts.Length < spaceDimension)
throw new ArgumentException("The line " + lineIdx + " has invalid dimension!");
else if (lineParts.Length > spaceDimension)
{
string[] tempLineParts = new string[spaceDimension];
for (int idx = 0; idx < spaceDimension; idx++)
{
tempLineParts[idx] = lineParts[idx];
}
lineParts = tempLineParts;
}
double[] coords = new double[spaceDimension];
for (int coordIdx = 0; coordIdx < lineParts.Length; coordIdx++)
{
coords[coordIdx] = Double.Parse(lineParts[coordIdx], NumberStyles.Float,
CultureInfo.InvariantCulture);
}
histogramComputer.buildHistogramForDataRowTuple(histogramResolution, spaceDimension, minElems,
maxElems, binHefts, coords);
lineIdx++;
}
posteriorSum = innerBuildHistograms(inputParser, knuthPosteriorComputer, filename, spaceDimension,
pointNO, serverNO, upperBoundOfPostVals, posteriorValues, centralDiffs, initialHistRes, posteriorSum,
histogramResolution, binHefts);
}
return posteriorSum;
}
private static void writeOutInputSizes(InputParser inputParser, string filename, int spaceDimension,
int histogramResolution, int serverNO, int[] binHefts)
{
StringBuilder strBldr = new StringBuilder();
strBldr.AppendLine(spaceDimension.ToString());
strBldr.AppendLine(histogramResolution.ToString());
strBldr.AppendLine(serverNO.ToString());
for (int binIdx = 0; binIdx < binHefts.Length - 1; binIdx++)
{
strBldr.Append(binHefts[binIdx]).Append(" ");
}
strBldr.Append(binHefts[binHefts.Length - 1]);
filename = Path.GetFileNameWithoutExtension(filename);
string inputSizesOutput = @"c:\temp\data\" + filename + "_input_sizes_serv_" + serverNO
+ "_res_" + histogramResolution + ".dat";
System.IO.File.WriteAllText(inputSizesOutput, strBldr.ToString());
}
static void Main(string[] args)
{
InputParser inputParser = new InputParser();
HistogramComputer histogramComputer = new HistogramComputer();
KnuthPosteriorComputer knuthPosteriorComputer = new KnuthPosteriorComputer();
LMethod lMethod = new LMethod();
FurthestPointFromLineMethod furthestPointFromLineMethod = new FurthestPointFromLineMethod();
string filename;
int spaceDimension, pointNO, serverNO, upperBoundOfPostVals, initialHistRes;
double[] minElems, maxElems, posteriorValues, centralDiffs;
double posteriorSum;
Console.WriteLine("How would you like to execute histogram building? " +
"Would you like to apply stream mode?");
Console.WriteLine("(Please choose this mode only if you have prior information about " +
"object number and bounding box)");
bool streamMode = bool.Parse(Console.ReadLine());
if (streamMode)
{
handleStreamMode(inputParser, histogramComputer, knuthPosteriorComputer, out filename, out spaceDimension,
out pointNO, out serverNO, out upperBoundOfPostVals, out initialHistRes, out minElems, out maxElems,
out posteriorValues, out centralDiffs, out posteriorSum);
}
else
{
handleNormalMode(inputParser, histogramComputer, knuthPosteriorComputer, out filename, out spaceDimension,
out pointNO, out serverNO, out upperBoundOfPostVals, out initialHistRes, out minElems, out maxElems,
out posteriorValues, out centralDiffs, out posteriorSum);
}
writeOutStats(lMethod, furthestPointFromLineMethod, upperBoundOfPostVals, initialHistRes,
posteriorValues, centralDiffs, posteriorSum);
Console.WriteLine("Press any key to continue...");
Console.Read();
}
private static double innerBuildHistograms(InputParser inputParser, KnuthPosteriorComputer knuthPosteriorComputer,
string filename, int spaceDimension, int pointNO, int serverNO, int upperBoundOfPostVals,
double[] posteriorValues, double[] centralDiffs, int initialHistRes, double posteriorSum,
int histogramResolution, int[] binHefts)
{
writeOutInputSizes(inputParser, filename, spaceDimension, histogramResolution, serverNO, binHefts);
double posteriorValue = knuthPosteriorComputer.evaluate(Math.Pow(histogramResolution, spaceDimension),
pointNO, binHefts);
int idx = histogramResolution - initialHistRes;
posteriorValues[idx] = posteriorValue;
determineCentralDiff(upperBoundOfPostVals, posteriorValues, centralDiffs, initialHistRes,
histogramResolution, idx);
Console.WriteLine("Histogram resolution: {0}, posterior value: {1}, central diff: {2}",
histogramResolution, posteriorValue, centralDiffs[idx]);
posteriorSum += posteriorValue;
return posteriorSum;
}
private static void initializeVariables(InputParser inputParser, int pointNO, out int serverNO,
out int upperBoundOfPostVals, out double[] posteriorValues, out double[] centralDiffs,
out int initialHistRes)
{
serverNO = inputParser.parseServerNO();
upperBoundOfPostVals = (int)(Math.Sqrt(pointNO));
//upperBoundOfPostVals = 150;
Console.WriteLine(upperBoundOfPostVals);
posteriorValues = new double[upperBoundOfPostVals - 1];
// The central difference approximations of second derivative of posterior:
centralDiffs = new double[upperBoundOfPostVals - 1];
initialHistRes = 2;
}
private static void handleStreamMode(InputParser inputParser, HistogramComputer histogramComputer,
KnuthPosteriorComputer knuthPosteriorComputer, out string filename, out int spaceDimension,
out int pointNO, out int serverNO, out int upperBoundOfPostVals, out int initialHistRes,
out double[] minElems, out double[] maxElems, out double[] posteriorValues, out double[] centralDiffs,
out double posteriorSum)
{
inputParser.parseInputFileStreamMode(out filename, out spaceDimension, out pointNO,
out minElems, out maxElems);
initializeVariables(inputParser, pointNO, out serverNO, out upperBoundOfPostVals, out posteriorValues,
out centralDiffs, out initialHistRes);
posteriorSum = buildHistogramsStreamMode(inputParser, histogramComputer, knuthPosteriorComputer,
filename, spaceDimension, pointNO, minElems, maxElems, serverNO, upperBoundOfPostVals,
posteriorValues, centralDiffs, initialHistRes);
}
