Excel 的 Loess 宏中使用哪些参数？

Question

我在论坛上找到了一个宏，它是用于时间序列数据的平滑过滤器，名为 Loess。但是，我无法正确运行该宏，因为我不确定参数是什么。这里是我想要平滑的数据。宏代码如下：

Public Function Loess(x As Variant, y As Variant, xnew As Variant, alpha As Variant, lambda As Integer)
    Dim n As Integer
    n = x.Rows.count
    n2 = xnew.Rows.count
    Dim q As Variant
    q = Application.WorksheetFunction.Floor(alpha * n, 1)
    q = Application.WorksheetFunction.Max(q, 1)
    q = Application.WorksheetFunction.Min(q, n)
    Dim z() As Variant
    ReDim z(n2)
    Dim i As Integer
    For i = 0 To n2 - 1
        Dim deltax() As Variant
        ReDim deltax(n)
        Dim j As Integer

        For j = 0 To n - 1
            deltax(j) = Abs(xnew(i + 1) - x(j + 1))
        Next j
        Dim qthdeltax As Variant

        qthdeltax = Application.WorksheetFunction.Small(deltax, q)

        Dim arg() As Variant
        ReDim arg(n)
        For j = 0 To n - 1
            arg(j) = Application.WorksheetFunction.Min(deltax(j) / (qthdeltax * Application.WorksheetFunction.Max(alpha, 1)), 1)
        Next j
        Dim tricube() As Variant
        ReDim tricube(n)
        Dim count As Integer
        count = 0
        For j = 0 To n - 1
            tricube(j) = (1 - Abs(arg(j)) ^ 3) ^ 3
            If tricube(j) > 0 Then
                count = count + 1
            End If
        Next j
        Dim weight() As Variant
        ReDim weight(count - 1)
        Dim count1, zeroes As Integer
        count1 = 0
        zeroes = 0
        For j = 0 To n - 1
            If tricube(j) > 0 Then
                weight(count1) = tricube(j)
                count1 = count1 + 1
            Else
                If count1 = 0 Then
                    zeroes = zeroes + 1
                End If
            End If
        Next j
        Dim weightx(), weighty() As Variant
        ReDim weightx(count - 1), weighty(count - 1)
        For j = 0 To count - 1
            weightx(j) = x(zeroes + j + 1)
            weighty(j) = y(zeroes + j + 1)
        Next j
        Dim p() As Variant
        ReDim p(lambda + 1, lambda + 1)
        p = Least2(weightx, weighty, lambda, weight)
        z(i) = Polyval(Application.WorksheetFunction.Transpose(p), xnew(i + 1))
    Next i
    Loess = Application.WorksheetFunction.Transpose(z)
End Function