这是一个有关概率中的回归分析算法,内有多种算法,欢迎大家使用.
源代码在线查看： 非线性逐步回归f3.frm
VERSION 5.00
Begin VB.Form frmContinue
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "非线性逐步回归"
ClientHeight = 8010
ClientLeft = 60
ClientTop = 345
ClientWidth = 7425
LinkTopic = "Form1"
ScaleHeight = 8010
ScaleWidth = 7425
StartUpPosition = 3 '窗口缺省
Begin VB.TextBox txtData
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Index = 0
Left = 5160
TabIndex = 12
Text = "txtData"
Top = 0
Visible = 0 'False
Width = 855
End
Begin VB.TextBox txtV
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Index = 0
Left = 2040
TabIndex = 8
Top = 1560
Width = 1575
End
Begin VB.TextBox txtFile
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Left = 480
TabIndex = 5
Text = "txtFile"
Top = 720
Width = 6375
End
Begin VB.CommandButton cmdCalculate
Caption = "计 算"
Height = 375
Left = 3720
TabIndex = 3
Top = 0
Width = 1215
End
Begin VB.CommandButton cmdExit
Caption = "结 束"
Height = 375
Left = 2520
TabIndex = 2
Top = 0
Width = 1215
End
Begin VB.CommandButton cmdSmo
Caption = "平 滑"
Height = 375
Left = 1320
TabIndex = 1
ToolTipText = "由原有的入选自变量值求函数值并存盘"
Top = 0
Width = 1215
End
Begin VB.CommandButton cmdPre
Caption = "预 测"
Height = 375
Left = 0
TabIndex = 0
ToolTipText = "给定入选自变量计算函数值"
Top = 0
Width = 1335
End
Begin VB.Label lblCol
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
Caption = "lblCol"
ForeColor = &H80000008&
Height = 255
Index = 0
Left = 6600
TabIndex = 14
Top = 0
Visible = 0 'False
Width = 735
End
Begin VB.Label lblRow
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
Caption = "lblRow"
ForeColor = &H80000008&
Height = 255
Index = 0
Left = 6000
TabIndex = 13
Top = 0
Visible = 0 'False
Width = 615
End
Begin VB.Label lblR
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
ForeColor = &H80000008&
Height = 255
Left = 5400
TabIndex = 11
Top = 1680
Width = 1455
End
Begin VB.Label Label3
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "（Y = ？？？）"
ForeColor = &H80000008&
Height = 255
Left = 5400
TabIndex = 10
Top = 1440
Width = 1455
End
Begin VB.Label Label2
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "预测的结果"
ForeColor = &H80000008&
Height = 255
Left = 5040
TabIndex = 9
Top = 1200
Width = 2175
End
Begin VB.Label lblV
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
BorderStyle = 1 'Fixed Single
ForeColor = &H80000008&
Height = 270
Index = 0
Left = 1080
TabIndex = 7
Top = 1560
Width = 975
End
Begin VB.Label Label1
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "在下列文本框（无*****者）键入选中的自变量值"
ForeColor = &H80000008&
Height = 255
Left = 120
TabIndex = 6
Top = 1200
Width = 4575
End
Begin VB.Label lblFile
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "保存平滑后的数据文件（可以改变）"
ForeColor = &H80000008&
Height = 255
Left = 1680
TabIndex = 4
Top = 480
Width = 4575
End
End
Attribute VB_Name = "frmContinue"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'非线性逐步回归
Option Explicit
Dim strSmoFile As String, I As Integer, J As Integer
Dim intFileNumber As Integer, vntA As Variant
Private Sub Form_Load()
Me.Top = 0
cmdCalculate.Visible = False
lblFile.Visible = False: txtFile.Visible = False
lblV(0).Visible = False: txtV(0).Visible = False
Label1.Visible = False: Label2.Visible = False
Label3.Visible = False: lblR.Visible = False
intFileNumber = FreeFile '取得空闲的文件号码
Open strFileName For Input As intFileNumber '打开文件
'形成文本框数组，但不在窗体上显示
For I = 1 To intRowAll
For J = 1 To intCol
Input #intFileNumber, vntA
Load txtData((I - 1) * intCol + J)
txtData((I - 1) * intCol + J).Text = vntA
Next J
Next I
'形成上部标签，但不在窗体上显示
For I = 1 To intCol
Input #intFileNumber, vntA
Load lblCol(I)
lblCol(I).Caption = vntA
Next I
'形成左边标签，但不在窗体上显示
For I = 1 To intRowAll
Input #intFileNumber, vntA
Load lblRow(I)
lblRow(I).Caption = vntA
Next I
Close
End Sub
'预测
Private Sub cmdPre_Click()
On Error Resume Next
Dim sngH As Single
cmdCalculate.Caption = "计 算"
cmdCalculate.Visible = True
lblFile.Visible = False: txtFile.Visible = False
Label1.Visible = True
sngH = lblV(0).Height
For I = 1 To m
Load lblV(I): Load txtV(I)
lblV(I).Move lblV(0).Left, lblV(0).Top + (I - 1) * sngH
lblV(I).Caption = "X" & Str(I)
lblV(I).Visible = True
txtV(I).Move txtV(0).Left, txtV(0).Top + (I - 1) * sngH
If b(I) = 0 Then txtV(I).Text = "*****" Else txtV(I).Text = " "
txtV(I).Visible = True
Next I
txtV(1).SetFocus
End Sub
'平滑
Private Sub cmdSmo_Click()
On Error Resume Next
cmdCalculate.Caption = "保 存"
cmdCalculate.Visible = True
lblV(0).Visible = False: txtV(0).Visible = False
Label1.Visible = False: Label2.Visible = False
Label3.Visible = False: lblR.Visible = False
For I = 1 To m
lblV(I).Visible = False: txtV(I).Visible = False
Next I
txtFile.Text = frmFileName.Dir1.Path & _
"\平滑_" & frmFileName.File1.FileName
lblFile.Visible = True
txtFile.Visible = True
End Sub
'“计算”或“保存”
Private Sub cmdCalculate_Click()
Dim intNumber As Integer, vntA As Variant
Dim sngY As Single, dblX As Double
If cmdCalculate.Caption = "保 存" Then GoTo LSave
Label2.Visible = True: Label3.Visible = True
lblR.Visible = True
sngY = b(0)
For I = 1 To m
If txtV(I).Text = " " Then
MsgBox "必须在文本框内填入数据后再计算！"
Exit Sub
End If
dblX = Val(txtV(I))
xyChange dblX, xyType(I)
sngY = sngY + b(I) * dblX '预测
Next I
lblR.Caption = Str(sngY)
Exit Sub
LSave:
'将平滑结果保存到数据文件
For I = 1 To intRow
sngY = b(0)
For J = 1 To m
If b(J) 0 Then
dblX = xy(I, J)
xyChange dblX, xyType(J)
sngY = sngY + b(J) * dblX '平滑计算
End If
Next J
txtData((intRowAll - intRow + I - 1) * intCol + intCol) = Str(sngY)
Next I
MsgBox "现在存盘，请耐心等待！"
intNumber = FreeFile '取得空闲的文件号
Open txtFile.Text For Output As intNumber '打开文件
'保存数据
txtData(3 * intCol + 1) = "回归平滑"
For I = 1 To intRowAll
For J = 1 To intCol
Write #intNumber, txtData((I - 1) * intCol + J);
Next J
Next I
'保存上部标签
For I = 1 To intCol
Write #intNumber, lblCol(I).Caption;
Next I
'保存左边标签
For I = 1 To intRowAll
Write #intNumber, lblRow(I).Caption;
Next I
Close '关闭文件
MsgBox "存盘完成，请继续进行！"
End Sub
Private Sub txtV_Change(Index As Integer)
lblR.Caption = ""
End Sub
'结束
Private Sub cmdExit_Click()
Unload Me
End
End Sub
