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： 一元线性f3.frm
VERSION 5.00
Begin VB.Form frmContinue
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "一元线性回归"
ClientHeight = 2085
ClientLeft = 60
ClientTop = 345
ClientWidth = 7425
LinkTopic = "Form1"
ScaleHeight = 2085
ScaleWidth = 7425
StartUpPosition = 3 '窗口缺省
Begin VB.TextBox txtData
Height = 270
Index = 0
Left = 5040
TabIndex = 10
Top = 0
Visible = 0 'False
Width = 495
End
Begin VB.TextBox txtV
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Left = 1800
TabIndex = 7
Top = 1440
Width = 1455
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 lblY
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "Y="
BeginProperty Font
Name = "宋体"
Size = 14.25
Charset = 134
Weight = 400
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H80000008&
Height = 255
Left = 4680
TabIndex = 14
Top = 1440
Width = 615
End
Begin VB.Label lblV
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "X ="
BeginProperty Font
Name = "宋体"
Size = 14.25
Charset = 134
Weight = 400
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
ForeColor = &H80000008&
Height = 255
Left = 1080
TabIndex = 13
Top = 1440
Width = 615
End
Begin VB.Label lblCol
Caption = "lblCol"
Height = 255
Index = 0
Left = 6360
TabIndex = 12
Top = 0
Visible = 0 'False
Width = 735
End
Begin VB.Label lblRow
Caption = "lblRow"
Height = 255
Index = 0
Left = 5640
TabIndex = 11
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 = 9
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 = 8
Top = 1200
Width = 2175
End
Begin VB.Label Label1
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "自变量值"
ForeColor = &H80000008&
Height = 255
Left = 1200
TabIndex = 6
Top = 1200
Width = 2415
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
'一元线性回归
Option Explicit
Dim strSmoFile As String, I As Integer, J As Integer
Dim intFileNumber As Integer, vntA As Variant
Private Sub Form_Load()
cmdCalculate.Visible = False
lblFile.Visible = False: txtFile.Visible = False
lblV.Visible = False: txtV.Visible = False
Label1.Visible = False: Label2.Visible = False
lblY.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: lblV.Visible = True: txtV.Visible = True
End Sub
'平滑
Private Sub cmdSmo_Click()
On Error Resume Next
cmdCalculate.Caption = "保 存"
cmdCalculate.Visible = True
lblV.Visible = False: txtV.Visible = False
Label1.Visible = False: Label2.Visible = False
lblY.Visible = False: lblR.Visible = False
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
If cmdCalculate.Caption = "保 存" Then GoTo LSave
Label2.Visible = True: lblY.Visible = True: lblR.Visible = True
If txtV.Text = " " Then
MsgBox "必须在文本框内填入数据后再计算！"
Exit Sub
End If
sngY = b0 + b1 * Val(txtV)
lblR.Caption = Str(sngY)
Exit Sub
LSave:
For I = 1 To intCol
sngY = b0 + b1 * x(I)
txtData((intRowAll - 1) * intCol + I) = 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()
lblR.Caption = ""
End Sub
'结束
Private Sub cmdExit_Click()
Unload Me
End
End Sub
