频数m2.bas

<VB数理统计实用算法>书中的算法源程序

Attribute VB_Name = "modMethod"
'频数和累积频数的计算方法
Option Explicit
'P(1 To 行数，1 To 列数)：原始数据
'R(1 To 3，1 To 分段数)：
'   R(1,...)保存段值；R(2,...)保存频数；R(3,...)保存累积频数
Public Sub Fre_Add(P, R)
    Dim I As Integer, J As Integer, L As Integer
    Dim M As Integer, N As Integer, Z As Integer
'根据数组求下标的上界
'M是数据的行数
'N是数据的列数
'Z是数据的分段数
    M = UBound(P, 1): N = UBound(P, 2): Z = UBound(R, 2)
'计算频数
    For I = 1 To M
        For J = 1 To N
            For L = 1 To Z
                If P(I, J) <= R(1, L) Then
'落入区间范围
                    R(2, L) = R(2, L) + 1
                    GoTo 100
                End If
            Next L
100:    Next J
    Next I
'计算累积频数
    For L = 1 To Z
        R(3, L) = R(2, L)
    Next L
    For L = 2 To Z
        R(3, L) = R(3, L) + R(3, L - 1)
    Next L
End Sub