在excel ,用VBA编写回归分析程序

您好！您可以使用VBA编写代码来实现回归分析。这是一个示例代码，用于在Excel中计算简单线性回归模型：

Sub SimpleLinearRegression()
  Dim X() As Double, Y() As Double
  Dim N As Long, i As Long
  Dim MeanX As Double, MeanY As Double
  Dim SumXX As Double, SumXY As Double
  Dim Slope As Double, YIntercept As Double
  Dim PredictedY As Double

  'Retrieve data from worksheet into arrays X and Y
  N = Range("A2", Range("A2").End(xlDown)).Count
  ReDim X(1 To N), Y(1 To N)
  For i = 1 To N
    X(i) = Cells(i + 1, 1).Value
    Y(i) = Cells(i + 1, 2).Value
  Next i

  'Calculate mean of X and Y
  MeanX = Application.WorksheetFunction.Average(X)
  MeanY = Application.WorksheetFunction.Average(Y)

  'Calculate Sum of XX, XY
  For i = 1 To N
    SumXX = SumXX + (X(i) - MeanX) ^ 2
    SumXY = SumXY + (X(i) - MeanX) * (Y(i) - MeanY)
  Next i

  'Calculate slope and Y-intercept
  Slope = SumXY / SumXX
  YIntercept = MeanY - Slope * MeanX

  'Output results
  Range("D2").Value = "Slope"
  Range("D3").Value = "Y-Intercept"
  Range("E2").Value = Slope
  Range("E3").Value = YIntercept

  'Predict Y for a given X
  PredictedY = YIntercept + Slope * X(1)
  Range("E5").Value = "Predicted Y"
  Range("E6").Value = PredictedY
End Sub

这段代码从工作表中获取数据，并将其存储在X和Y数组中。然后，它计算X和Y的平均值，XX的和以及XY的和，并使用这些值计算斜率和Y截距。最后，它预测X(1)的Y值并将结果输出到工作表中。

注意：这是一个简单的线性回归模型，它假