private void voBtnKMedoid_Click(object sender, EventArgs e)
{
try
{
// define distance function
Func <Point, Point, double> koEuclidean = (a, b) => Math.Sqrt(Math.Pow((a.X - b.X), 2) + Math.Pow((a.Y - b.Y), 2));
this.voKM = new KMedoid <Point>(koEuclidean);
int kiK = int.Parse(this.voTbK.Text);
this.voKM.MCompute(kiK, this.voPList);
Visualization.MDrawClusters(this.voPB, this.voPList, this.voKM.VoClusters, kiK,
this.voKM.VdMedoids.ToList( ), 0.7);
this.voTbResult.Text = mComputeAndShowVarianceResults(kiK);
}
catch (Exception koEx)
{
MessageBox.Show(koEx.Message);
}
}
private void btnKMedoid_Click(object sender, EventArgs e)
{
try
{
// define distance function
Func <Point, Point, double> euclidean = (a, b) => Math.Sqrt(Math.Pow((a.X - b.X), 2) + Math.Pow((a.Y - b.Y), 2));
km = new KMedoid <Point>(euclidean);
int k = int.Parse(txtClusters.Text);
compute.Start();
km.Compute(k, PList);
compute.Stop();
MessageBox.Show("Time elapsed to compute (ms): " + compute.ElapsedMilliseconds);
Visualization.DrawClusters(pic1, PList, km.Clusters, k, km._medoids, 0.7);
txtResult.Text = ComputeAndShowVarianceResults(k);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private void voBtnRedraw_Click(object sender, EventArgs e)
{
Visualization.MDrawClusters(this.voPB, this.voPList, this.voKM.VoClusters,
int.Parse(this.voTbK.Text), this.voKM.VdMedoids.ToList( ), 0.5);
}
private void btnInitialize_Click(object sender, EventArgs e)
{
PList.Clear();
Random rand = new Random();
int dataLength = 1000; // number of data points
// create 4 distributions with different means and std devs
double meanx0 = 150;
double meanx1 = 250;
double meanx2 = 375;
double meanx3 = 475;
double meany0 = 175;
double meany1 = 250;
double meany2 = 350;
double meany3 = 450;
double stddevx0 = 240;
double stddevx1 = 270;
double stddevx2 = 220;
double stddevx3 = 260;
double stddevy0 = 250;
double stddevy1 = 240;
double stddevy2 = 280;
double stddevy3 = 245;
int index = 0;
Parallel.For(0, (dataLength / 4), (i) =>
//for (int i = 0; i < dataLength / 4; i++)
{
Point pt = new Point();
double rnum = rand.NextDouble();
if (rnum < 0.5)
{
pt.X = (int)(rand.NextDouble() * stddevx0 / 2 + meanx0);
}
else
{
pt.X = (int)(-1 * rand.NextDouble() * stddevx0 / 2 + meanx0);
}
if (rnum < 0.5)
{
pt.Y = (int)(rand.NextDouble() * stddevy0 / 2 + meany0);
}
else
{
pt.Y = (int)(-1 * rand.NextDouble() * stddevy0 / 2 + meany0);
}
index++;
PList.Add(pt);
});
Parallel.For(0, (dataLength / 4), (i) =>
//for (int i = 0; i < dataLength / 4; i++)
{
Point pt = new Point();
double rnum = rand.NextDouble();
if (rnum < 0.5)
{
pt.X = (int)(rand.NextDouble() * stddevx1 / 2 + meanx1);
}
else
{
pt.X = (int)(-1 * rand.NextDouble() * stddevx1 / 2 + meanx1);
}
if (rnum < 0.5)
{
pt.Y = (int)(rand.NextDouble() * stddevy1 / 2 + meany1);
}
else
{
pt.Y = (int)(-1 * rand.NextDouble() * stddevy1 / 2 + meany1);
}
index++;
PList.Add(pt);
});
Parallel.For(0, (dataLength / 4), (i) =>
//for (int i = 0; i < dataLength / 4; i++)
{
double rnum = rand.NextDouble();
Point pt = new Point();
if (rnum < 0.5)
{
pt.X = (int)(rand.NextDouble() * stddevx2 / 2 + meanx2);
}
else
{
pt.X = (int)(-1 * rand.NextDouble() * stddevx2 / 2 + meanx2);
}
if (rnum < 0.5)
{
pt.Y = (int)(rand.NextDouble() * stddevy2 / 2 + meany2);
}
else
{
pt.Y = (int)(-1 * rand.NextDouble() * stddevy2 / 2 + meany2);
}
PList.Add(pt);
index++;
});
Parallel.For(0, (dataLength / 4), (i) =>
//for (int i = 0; i < dataLength / 4; i++)
{
double rnum = rand.NextDouble();
Point pt = new Point();
if (rnum < 0.5)
{
pt.X = (int)(rand.NextDouble() * stddevx3 / 2 + meanx3);
}
else
{
pt.X = (int)(-1 * rand.NextDouble() * stddevx3 / 2 + meanx3);
}
if (rnum < 0.5)
{
pt.Y = (int)(rand.NextDouble() * stddevy3 / 2 + meany3);
}
else
{
pt.Y = (int)(-1 * rand.NextDouble() * stddevy3 / 2 + meany3);
}
index++;
PList.Add(pt);
});
Visualization.DrawPoints(pic1, PList, 0.7);
MessageBox.Show("Data initialized for " + PList.Count + " points");
}
private void btnRedraw_Click(object sender, EventArgs e)
{
Visualization.DrawClusters(pic1, PList, km.Clusters, int.Parse(txtClusters.Text), km._medoids, 0.5);
}