private static int DataPointSorter(DataPoint d1, DataPoint d2)
{
if (d1.Time > d2.Time)
return 1;
if (d1.Time < d2.Time)
return -1;
return 0;
}
public static List<DataPoint> GenerateDataInBetweenPoints(DataPoint p1, DataPoint p2)
{
int randomStay1 = Random.Next(3600 / 5, 36000 / 5);
int randomStay2 = Random.Next(3600 / 5, 36000 / 5);
double distance = GetDistanceInKm(p1.Location, p2.Location);
double speed = 6;
if (distance < 2)
{
speed = new Random(Seed).Next(2, 10);
}
else if (distance > 10)
{
speed = Random.Next(30, 80);
}
else
{
speed = Random.Next(20, 50);
}
int time = (int)(distance / speed) * (3600 / 5);
double latDelta = (p1.Location.Lat - p2.Location.Lat) / (double)time;
double longDelta = (p1.Location.Lng - p2.Location.Lng) / (double)time;
List<DataPoint> dataPoints = new List<DataPoint>();
for (int i = 0; i < randomStay1; i++)
{
DataPoint dataPoint = new DataPoint()
{
UserId = p1.UserId,
Location = new Location(p1.Location.Lat, p1.Location.Lng),
DataType = DataType.FakeStay,
MoveHint = 0
};
dataPoint.WifiLocation = PerturbDataPointForWifi(p1.Location);
dataPoint.GSMLocation = PerturbDataPointForGSM(p1.Location);
dataPoints.Add(dataPoint);
}
/* Interpolation */
for (int i = 1; i <= time; i += 10)
{
double lat = p1.Location.Lat + (i * latDelta);
double lng = p1.Location.Lng + (i * longDelta);
DataPoint dataPoint = new DataPoint()
{
UserId = p1.UserId,
Location = new Location(lat, lng),
DataType = DataType.FakeMove,
MoveHint = 1
};
dataPoint.WifiLocation = PerturbDataPointForWifi(p1.Location);
dataPoint.GSMLocation = PerturbDataPointForGSM(p1.Location);
dataPoints.Add(dataPoint);
}
for (int i = 0; i < randomStay2; i++)
{
DataPoint dataPoint = new DataPoint()
{
UserId = p2.UserId,
Location = new Location(p2.Location.Lat, p2.Location.Lng),
DataType = DataType.FakeStay,
MoveHint = (i == 0) ? 1 : 0
};
dataPoint.WifiLocation = PerturbDataPointForWifi(p2.Location);
dataPoint.GSMLocation = PerturbDataPointForGSM(p2.Location);
dataPoints.Add(dataPoint);
}
return dataPoints;
}
/* File IO routines */
public static List<List<DataPoint>> ReadData(int userIndex)
{
List<List<DataPoint>> data = new List<List<DataPoint>>();
string[] userDirs = Directory.GetDirectories(BaseDir);
string user = userDirs[userIndex];
string trajectoryDir = Path.Combine(userDirs[userIndex], "Trajectory");
string[] trajectories = Directory.GetFiles(trajectoryDir);
for (int j = 0; j < trajectories.Length; j++)
{
List<DataPoint> dataPoints = new List<DataPoint>();
StreamReader sr = new StreamReader(trajectories[j]);
for (int k = 0; k < 6; k++) sr.ReadLine();
while (true)
{
string line = sr.ReadLine();
if (line == null) break;
string[] splits = line.Split(new char[] { ',' });
DataPoint dataPoint = new DataPoint()
{
UserId = user,
Location = new Location(Convert.ToDouble(splits[0]), Convert.ToDouble(splits[1])),
DataType = DataType.Original,
MoveHint = 1
};
dataPoint.WifiLocation = PerturbDataPointForWifi(dataPoint.Location);
dataPoint.GSMLocation = PerturbDataPointForGSM(dataPoint.Location);
dataPoints.Add(dataPoint);
}
sr.Close();
data.Add(dataPoints);
}
return data;
}
