📄 多项式逐步回归f3.frm
字号:
VERSION 5.00
Begin VB.Form frmContinue
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "多项式逐步回归"
ClientHeight = 8010
ClientLeft = 60
ClientTop = 345
ClientWidth = 7425
LinkTopic = "Form1"
ScaleHeight = 8010
ScaleWidth = 7425
StartUpPosition = 3 '窗口缺省
Begin VB.CommandButton cmdEQL
Caption = "等 距"
Height = 375
Left = 1440
TabIndex = 13
Top = 0
Width = 735
End
Begin VB.TextBox txtData
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Index = 0
Left = 5160
TabIndex = 10
Text = "txtData"
Top = 0
Visible = 0 'False
Width = 855
End
Begin VB.TextBox txtV
Alignment = 2 'Center
Appearance = 0 'Flat
Height = 270
Left = 1440
TabIndex = 7
Top = 1440
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 = 2880
TabIndex = 3
Top = 0
Width = 1455
End
Begin VB.CommandButton cmdExit
Caption = "退 出"
Height = 375
Left = 2160
TabIndex = 2
Top = 0
Width = 735
End
Begin VB.CommandButton cmdSmo
Caption = "平 滑"
Height = 375
Left = 720
TabIndex = 1
ToolTipText = "由原有的入选自变量值求函数值并存盘"
Top = 0
Width = 735
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 = 735
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 = 12
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 = 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 = 3720
TabIndex = 9
Top = 1440
Width = 1455
End
Begin VB.Label lblY
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "预测的结果"
ForeColor = &H80000008&
Height = 255
Left = 3360
TabIndex = 8
Top = 1200
Width = 2175
End
Begin VB.Label lblV
Alignment = 2 'Center
Appearance = 0 'Flat
BackColor = &H80000005&
Caption = "键入自变量值"
ForeColor = &H80000008&
Height = 255
Left = 1440
TabIndex = 6
Top = 1200
Width = 1695
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
'多项式逐步回归
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
txtV.Visible = False: lblR.Visible = False
lblV.Visible = False: lblY.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
cmdCalculate.Caption = "计 算"
cmdCalculate.Visible = True
lblFile.Visible = False: txtFile.Visible = False
lblV.Visible = True
txtV.Visible = True: txtV.SetFocus
Key = 1 '预测标志
cmdPre.Visible = False: cmdSmo.Visible = False: cmdEQL.Visible = False
End Sub
'平滑
Private Sub cmdSmo_Click()
On Error Resume Next
cmdCalculate.Caption = "计算并保存"
cmdCalculate.Visible = True
txtV.Visible = False: lblV.Visible = False
lblY.Visible = False: lblR.Visible = False
'保存平滑结果的文件名
txtFile.Text = frmFileName.Dir1.Path & _
"\平滑_" & frmFileName.File1.FileName
lblFile.Caption = "保存平滑后的数据文件（可以改变）"
lblFile.Visible = True: txtFile.Visible = True
Key = 2 '平滑标志
cmdPre.Visible = False: cmdSmo.Visible = False: cmdEQL.Visible = False
End Sub
'等距
Private Sub cmdEQL_Click()
On Error Resume Next
cmdCalculate.Caption = "计算并保存"
cmdCalculate.Visible = True
lblY.Visible = False: lblR.Visible = False
txtFile.Text = frmFileName.Dir1.Path & _
"\等距_" & frmFileName.File1.FileName
lblFile.Caption = "保存等距后的数据文件（可以改变）"
lblFile.Visible = True: txtFile.Visible = True
lblV.Visible = True: txtV.Visible = True: txtV.SetFocus
lblV.Caption = "m=": lblV.Caption = "等距点数"
Key = 3 '等距标志
cmdPre.Visible = False: cmdSmo.Visible = False: cmdEQL.Visible = False
End Sub
'计算、保存
Private Sub cmdCalculate_Click()
Dim intNumber As Integer, vntA As Variant
Dim I As Integer, J As Integer, sngY As Single
Dim dblX As Double, dblY As Double, MM As Integer
Dim xMax As Double, xMin As Double, xInt As Double
If Key = 2 Then GoTo L2
If Key = 3 Then GoTo L3
lblV.Visible = True: txtV.Visible = True: txtV.SetFocus
'预测计算
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 = b(0)
For I = 1 To m
sngY = sngY + b(I) * Val(txtV) ^ I '预测值
Next I
lblY.Visible = True: lblR.Visible = True: lblR.Caption = Str(sngY)
Exit Sub
L2:
'保存数据准备
intNumber = FreeFile '取得空闲的文件号
Open txtFile.Text For Output As intNumber '打开文件
'平滑计算
For I = 1 To intCol '计算每个数据点的拟合值
sngY = b(0)
For J = 1 To m
sngY = sngY + b(J) * XY(1, I) ^ J '拟合值
Next J
'在平滑情况下，行数intRow与原始数据是一样的，都是2。总行数intRowAll也不变
'自变量行的数值不变。改变的是因变量值，个数不变
'将因变量送入txtData中保存，以便存盘
txtData((intRowAll - 1) * intCol + I) = Str(sngY)
Next I
GoTo L4
L3:
'等距化
'控件数组的行数和列数都发生变化，在重新建立前需卸载
For I = 1 To intRowAll
For J = 1 To intCol
Unload txtData((I - 1) * intCol + J)
Next J
Next I
For I = 1 To intCol
Unload lblCol(I)
Next I
For I = 1 To intRowAll
Unload lblRow(I)
Next I
'等距计算
If txtV.Text = "" Then
MsgBox "必须在文本框内填入数据后再计算！"
Exit Sub
End If
'求自变量的最大值和最小值
'XY是原始数据。XY(1,...)为自变量。
xMax = XY(1, 1): xMin = XY(1, 1)
For I = 1 To intCol
If XY(1, I) > xMax Then xMax = XY(1, I)
If XY(1, I) < xMin Then xMin = XY(1, I)
Next I
'等距化时不存自变量行，故行数为1，总行数为7
intRow = 1: intRowAll = 7
MM = Val(txtV): intCol = MM
'保存数据准备
intNumber = FreeFile '取得空闲的文件号
Open txtFile.Text For Output As intNumber '打开文件
'重新按新的参数加载控件数组
For I = 1 To intRowAll
For J = 1 To intCol
Load txtData((I - 1) * intCol + J)
Next J
Next I
For I = 1 To intCol
Load lblCol(I)
Next I
For I = 1 To intRowAll
Load lblRow(I)
Next I
ReDim newY(1 To MM) '因变量
xInt = (xMax - xMin) / MM '等距化时X轴的增量
For I = 1 To MM
dblX = xMin + (I - 1) * xInt
sngY = b(0)
For J = 1 To m
sngY = sngY + b(J) * dblX ^ J '拟合值
Next J
'将因变量送入txtData中保存，以便存盘
'将等值化后的Y值保存在最后一行
txtData(6 * intCol + I) = Str(sngY)
Next I
intCol = MM: txtData(1) = Str(intCol) '保存列数,MM是列数
txtData(intCol + 1) = 1 '保存行数
txtData(2 * intCol + 1) = 7 '保存总行数
txtData(3 * intCol + 1) = "多项式" '函数类型
txtData(4 * intCol + 1) = "等距数据" '保存行标
For I = 2 To intCol
txtData(I) = "*********"
txtData(intCol + I) = "*********"
txtData(2 * intCol + I) = "*********"
txtData(3 * intCol + I) = "*********"
txtData(4 * intCol + I) = "*********"
Next I
For I = 1 To intCol
txtData(5 * intCol + I) = I '列标
lblCol(I).Caption = "第" & Str(I) & "列" '上部标签
Next I
lblRow(1).Caption = "列数": lblRow(2).Caption = "行数"
lblRow(3).Caption = "总行数": lblRow(4).Caption = "标题"
lblRow(5).Caption = "行标": lblRow(6).Caption = "列标"
lblRow(7).Caption = "数字行"
L4:
MsgBox "现在存盘，请耐心等待！"
'写数据行
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
cmdCalculate.Visible = False
MsgBox "存盘完成，请退出！"
End Sub
Private Sub txtV_Change()
lblR.Caption = ""
End Sub
'退出
Private Sub cmdExit_Click()
Unload Me
frmFileName.Visible = True
End Sub
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -