//Расчет новых параметров регрессии и построение нового графика продаж вместе с линией тренда
private void displaySalesGraph_Click(object sender, EventArgs e)
{
try
{
try
{
chart1.Series[0].Points.Clear();
chart1.Series[0].Points.Dispose();
chart1.Series[1].Points.Clear();
chart1.Series[1].Points.Dispose();
chart1.Series[2].Points.Clear();
chart1.Series[2].Points.Dispose();
}
catch { }
DBConnection.GetSellingsByYear(salesYears.Text);
x.Clear();
y.Clear();
foreach (DataRow row in DBConnection.dtSellingsByYear.AsEnumerable())
{
x.Add(Convert.ToSingle(row[0]));
y.Add(Convert.ToSingle(row[1]));
}
sales_chart(x, y);
LinearRegression.calculate_regression(x, y);
label20.Text = LinearRegression.mean_x.ToString("0.##");
label21.Text = LinearRegression.mean_y.ToString("0.##");
label22.Text = LinearRegression.std_deviation_x.ToString("0.##");
label23.Text = LinearRegression.std_deviation_y.ToString("0.##");
label2.Text = LinearRegression.covariation.ToString("0.##");
label4.Text = LinearRegression.correlation.ToString("0.##");
int end_x = Convert.ToInt32(x.Max()); //конечная точка линии тренда
trend_line(LinearRegression.intercept, LinearRegression.slope, end_x);
}
catch (Exception ex)
{
MessageBox.Show(ex.ToString());
}
}