private void btCount_Click(object sender, EventArgs e)
        {
            if(txtData.Text.Trim()=="")
            {
                showMsg("数据不能为空！"); return;
            }
            try
            {
                List<List<double>> X;
                List<double> Y;
                getData(out X, out Y);
                int i, j, m = X[0].Count, n = X.Count;
                txtResult.Text = "";
                RegresionClass reg = new RegresionClass(X, Y);
                double[] P = reg.getParamters();
                String s = "";
                if (P != null)
                {
                    for (j = 0; j < m; j++) s = s + "P[" + j.ToString() + "]=" + P[j].ToString() + "\r\n";
                    showResult(s);
                    s = "   实际值,   预测值\r\n";
                    double TSS = 0, RSS = 0, aveY = 0;
                    for (i = 0; i < n; i++)
                    {
                        double y = 0;
                        for (j = 0; j < m; j++) y = y + P[j] * X[i][j];
                        s = s + format(Y[i], 2, 8) + ",  " + format(y, 2, 8) + "\r\n";
                        aveY += Y[i];
                        TSS += Y[i] * Y[i];// 总平方和 
                        RSS += (y - Y[i]) * (y - Y[i]);//回归平方和
                    }
                    showResult(s);
                    aveY = aveY / n;
                    TSS = TSS - n * aveY * aveY;
                    showResult("TSS=" + TSS.ToString());
                    showResult("RSS=" + RSS.ToString());
                    showResult("RR=" + (1 - RSS / TSS).ToString());
                }

            }
            catch (Exception exp) { showMsg(exp.Message); }
        }