/// <summary>
/// Заполняет bmp изображением распределения данных сигнала.
/// </summary>
public static Bitmap FillBmpLogDistribution(float[] Data, int Width, int Height)
{
Bitmap bmp = new Bitmap(Width, Height);
Pen pen = Pens.DarkGreen;
Pen penLines = new Pen(Color.FromArgb(128, Color.Black));
Probability prob = new Probability(Data);
float Begin = prob.Min - 5;
float End = prob.Max + 5;
float Length = End - Begin;
float delta = Width / Length;
float sigma = (float)Math.Sqrt(prob.D);
float[] probData = new float[(int)Width];
float probDataMax = 0;
for (int i = 0; i < Data.Length; i++)
{
int index = (int)((Data[i] - Begin) * delta);
probData[index]++;
if (probDataMax < probData[index]) probDataMax = probData[index];
}
for (int i = 0; i < probData.Length; i++)
{
probData[i] = (float)Math.Log(probData[i] + 1);
}
probDataMax = (float)Math.Log(probDataMax + 1);
float dx = (float)Width / Length;
float dy = (float)Height / probDataMax;
using (var g = Graphics.FromImage(bmp))
{
for (int i = 0; i < probData.Length; i++)
{
float y2 = (Height - probData[i] * dy);
g.DrawLine(pen, i, Height, i, y2);
}
float x2 = (prob.M - Begin);
for (int i = 0; x2 > 0; i++)
{
float x = x2 * dx;
g.DrawLine(penLines, x, 2, x, Height - 2);
x2 -= sigma;
}
}
return bmp;
}
/// <summary>
/// Calculate the minimum of input array using splines
/// </summary>
public static PointF Minimum(float[] Data, int Offset, int Length)
{
if(Offset < 0) Offset = 0;
if (Data.Length < Offset + Length) Length = Data.Length - Offset;
if (Length < 2) return new PointF(Offset, Data[Offset]);
int Accuracy = 50;
float[] pts = new float[Length];
Probability prob_pts = new Probability(Data, Offset, Length);
for (int i = 0; i < Length; i++) pts[i] = Data[Offset + i] - prob_pts.M;
float[] data = Spline(pts, 0, Length, Accuracy);
float min = data[0];
float imin = 0;
for (int i = 1; i < data.Length; i++)
{
if (min > data[i])
{
min = data[i];
imin = i;
}
}
min += prob_pts.M;
return new PointF(Offset + imin / Accuracy, min);
}
/// <summary>
/// Заполняет bmp изображением распределения данных сигнала.
/// </summary>
public static Bitmap FillBmpDistribution(float[] Data)
{
int Width = 512;
int Height = 256;
Bitmap bmp = new Bitmap(Width, Height);
Pen pen = Pens.Bisque;
Probability prob = new Probability(Data);
float Begin = prob.Min;
float End = prob.Max;
float Length = End - Begin;
float delta = Width / Length;
int[] probData = new int[Data.Length / 100];
int probDataMax = 0;
for (int i = 0; i < Data.Length; i++)
{
int index = (int)((Data[i] - Begin) * delta);
probData[index]++;
if(probDataMax < probData[index]) probDataMax = probData[index];
}
float dy = (float)Height / probDataMax;
using (var g = Graphics.FromImage(bmp))
{
for (int i = 0; i < probData.Length; i++)
{
float y2 = (Height - probData[i] * dy);
g.DrawLine(pen, i, Height, i, y2);
}
}
return bmp;
}
