private bool PotentialsIteration(IReadOnlyList <Point[]> teachingPoints, ref PotentialsFunction result)
{
var nextIteration = false;
if (teachingPoints.Count != ClassCount)
{
throw new Exception();
}
for (var classNumber = 0; classNumber < ClassCount; classNumber++)
{
for (var i = 0; i < teachingPoints[classNumber].Length; i++)
{
result += _correction * PartFunction(teachingPoints[classNumber][i]);
var index = (i + 1) % teachingPoints[classNumber].Length;
var nextClassNumber = index == 0 ? (classNumber + 1) % ClassCount : classNumber;
var nextPoint = teachingPoints[nextClassNumber][index];
_correction = GetNewCorrection(nextPoint, result, nextClassNumber);
if (_correction != 0)
{
nextIteration = true;
}
}
}
return(nextIteration);
}
private void teachingButton_Click(object sender, EventArgs e)
{
_step = pictureBox.Height / 20;
var potentials = new PotentialsAlgorithm();
var teaching = new Point[2][];
teaching[0] = new Point[2];
teaching[1] = new Point[2];
teaching[0][0] = new Point((int)x11NumericUpDown.Value, (int)y11NumericUpDown.Value);
teaching[0][1] = new Point((int)x12NumericUpDown.Value, (int)y12NumericUpDown.Value);
teaching[1][0] = new Point((int)x21NumericUpDown.Value, (int)y21NumericUpDown.Value);
teaching[1][1] = new Point((int)x22NumericUpDown.Value, (int)y22NumericUpDown.Value);
_points[0].Add(teaching[0][0]);
_points[0].Add(teaching[0][1]);
_points[1].Add(teaching[1][0]);
_points[1].Add(teaching[1][1]);
var potentialsResult = potentials.GetResult(teaching);
_separetFunction = potentialsResult.Function;
functionTextBox.Text = String.Empty;
if (!potentialsResult.HasWarning)
{
functionTextBox.Text = "Разделяющая функция: " + _separetFunction.ToString();
}
else
{
MessageBox.Show("Невозможно построить разделяющую функцию", "POTENTIALS", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
var bitmap = new Bitmap(pictureBox.Width, pictureBox.Height);
using (var graphics = Graphics.FromImage(bitmap))
{
graphics.Clear(Color.White);
if (!potentialsResult.HasWarning)
{
DrawGraph(graphics);
}
graphics.DrawLine(Pens.Black, 0, pictureBox.Height / 2, pictureBox.Width, pictureBox.Height / 2);
graphics.DrawLine(Pens.Black, pictureBox.Width / 2, 0, pictureBox.Width / 2, pictureBox.Height);
for (var i = 0; i < 2; i++)
{
for (var j = 0; j < 2; j++)
{
DrawPoint(graphics, teaching[i][j], i);
}
}
}
pictureBox.Image = bitmap;
testGroupBox.Enabled = !potentialsResult.HasWarning;
}
private static int GetNewCorrection(Point nextPoint, PotentialsFunction result, int nextClassNumber)
{
var functionValue = result.GetValue(nextPoint);
if (functionValue <= 0 && nextClassNumber == 0)
{
return(1);
}
return(functionValue > 0 && nextClassNumber == 1 ? -1 : 0);
}
public PotentialsResult GetResult(Point[][] teachingPoints)
{
var function = new PotentialsFunction(0, 0, 0, 0);
var result = new PotentialsResult();
var nextIteration = true;
var iterationNumber = 0;
_correction = 1;
while (nextIteration && iterationNumber < IterationsCount)
{
iterationNumber++;
nextIteration = PotentialsIteration(teachingPoints, ref function);
}
if (iterationNumber == IterationsCount)
{
result.HasWarning = true;
}
result.Function = function;
return(result);
}
