public void NextEpoch(List <Point> points)
{
SimilarityCalculator.DistanceCalculationAlgorithm algorithm = SimilarityCalculator.EuclideanDistance;
foreach (Point point in points)
{
Point winnerNeuronCoordinate = new Point(0, 0);
double minimumSimilarity = int.MaxValue;
for (int i = 0; i < 10; i++)
{
for (int j = 0; j < 10; j++)
{
double similarity = point.SimilarityTo(neurons[i, j].coordinate, algorithm);
if (similarity < minimumSimilarity)
{
minimumSimilarity = similarity;
winnerNeuronCoordinate = new Point(i, j);
}
}
}
Neuron winnerNeuron = neurons[winnerNeuronCoordinate.X, winnerNeuronCoordinate.Y];
int newX = (int)(winnerNeuron.coordinate.X + rataInvatare[epoch] * (point.X - winnerNeuron.coordinate.X));
int newY = (int)(winnerNeuron.coordinate.Y + rataInvatare[epoch] * (point.Y - winnerNeuron.coordinate.Y));
winnerNeuron.coordinate = new Point(newX, newY);
SetNeuron(winnerNeuronCoordinate.X, winnerNeuronCoordinate.Y, winnerNeuron);
}
epoch++;
}
private void stepToolStripMenuItem_Click(object sender, EventArgs e)
{
foreach (Centroid centroid in centroids)
{
centroid.points.Clear();
}
SimilarityCalculator.DistanceCalculationAlgorithm algorithm = SimilarityCalculator.EuclideanDistance;
for (int i = 0; i < points.Count; i++)
{
double minimumSimilarity = Int32.MaxValue;
int centroidIndex = -1;
for (int j = 0; j < centroids.Count; j++)
{
double similarity = points[i].SimilarityTo(centroids[j].Coordinate, algorithm);
if (similarity < minimumSimilarity)
{
minimumSimilarity = similarity;
centroidIndex = j;
}
}
centroids[centroidIndex].points.Add(points[i]);
}
chart.Series.Clear();
foreach (Centroid centroid in centroids)
{
centroid.RecalculateCoordinate();
Series series = CreateSeries(new List <Point> {
centroid.Coordinate
});
series.MarkerSize = 30;
series.Color = centroid.color;
chart.Series.Add(series);
series = CreateSeries(centroid.points);
series.Color = Color.FromArgb(127, centroid.color);
chart.Series.Add(series);
}
}
public static double SimilarityTo(this Point point1, Point point2, SimilarityCalculator.DistanceCalculationAlgorithm algorithm)
{
return(algorithm(point1, point2));
}
