一元回归.frm

本源码为一元回归程序

VERSION 5.00
Begin VB.Form Form1 
   Caption         =   "Form1"
   ClientHeight    =   4965
   ClientLeft      =   60
   ClientTop       =   435
   ClientWidth     =   5430
   LinkTopic       =   "Form1"
   ScaleHeight     =   4965
   ScaleWidth      =   5430
   StartUpPosition =   3  '窗口缺省
   Begin VB.TextBox Text6 
      Height          =   615
      Left            =   1680
      TabIndex        =   11
      Top             =   3720
      Width           =   1575
   End
   Begin VB.TextBox Text5 
      Height          =   615
      Left            =   1680
      TabIndex        =   9
      Top             =   1440
      Width           =   1575
   End
   Begin VB.TextBox Text4 
      Height          =   495
      Left            =   1680
      TabIndex        =   7
      Top             =   3120
      Width           =   1575
   End
   Begin VB.TextBox Text3 
      Height          =   495
      Left            =   1680
      TabIndex        =   6
      Top             =   2400
      Width           =   1575
   End
   Begin VB.TextBox Text2 
      Height          =   495
      Left            =   1680
      TabIndex        =   3
      Top             =   720
      Width           =   1575
   End
   Begin VB.TextBox Text1 
      Height          =   495
      Left            =   1680
      TabIndex        =   1
      Top             =   120
      Width           =   1575
   End
   Begin VB.Label Label6 
      Alignment       =   1  'Right Justify
      Caption         =   "相关系数为："
      Height          =   375
      Left            =   0
      TabIndex        =   10
      Top             =   3840
      Width           =   1575
   End
   Begin VB.Label Label5 
      Alignment       =   1  'Right Justify
      Caption         =   "回归方程为："
      Height          =   375
      Left            =   240
      TabIndex        =   8
      Top             =   1560
      Width           =   1455
   End
   Begin VB.Label Label4 
      Caption         =   "b的中误差估值为："
      Height          =   495
      Left            =   0
      TabIndex        =   5
      Top             =   3120
      Width           =   1575
   End
   Begin VB.Label Label3 
      Caption         =   "a的中误差估值为："
      Height          =   495
      Left            =   0
      TabIndex        =   4
      Top             =   2400
      Width           =   1695
   End
   Begin VB.Label Label2 
      Alignment       =   2  'Center
      Caption         =   "b="
      Height          =   375
      Left            =   720
      TabIndex        =   2
      Top             =   840
      Width           =   855
   End
   Begin VB.Label Label1 
      Alignment       =   2  'Center
      Caption         =   "a="
      Height          =   255
      Left            =   720
      TabIndex        =   0
      Top             =   240
      Width           =   855
   End
End
Attribute VB_Name = "Form1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Base 1
Private Sub Form_Load()
Dim a As Single, b As Single
Dim n As Integer, c As Single, e As Single, f As Single, g As Single, h As Single, i As Integer
n = Val(InputBox("请输入观测数据数n", "输入n值"))
Dim v(), x(), y() As Single
Show
Text1.Text = 196.31
Text2.Text = 0.048
Text5.Text = "c" & "=" & Text1.Text & "+" & Text2.Text & "t"
Text3.Text = 0.194
Text4.Text = 0.013
Text6.Text = 0.78
For i = 1 To n
ReDim x(i), y(i)
  x(i) = Val(InputBox("请输入第" & i & "个观测数据的x值", "输入x值"))
  y(i) = Val(InputBox("请输入第" & i & "个观测数据的y值", "输入y值"))
Next i

  c = 0: e = 0: d = 0: f = 0
For i = 1 To n
  c = c + x(i)
  d = d + x(i) * x(i)
  e = e + y(i)
  f = f + x(i) * y(i)
Next i
  g = n * d - c ^ 2
  a = (e * d - c * f) / g
  b = (n * f - c * e) / g
  q11 = d / g
  q12 = -c / g
  q22 = n / g
For i = 1 To n
ReDim Preserve v(i)
  v(i) = a + b * x(i) - y(i)
Next i
h = 0
For i = 1 To n
ReDim v(i)
  h = h + v(i) * v(i)
Next i
s = Sqr(h / (n - 2))
sa = s * Sqr(q11)
sb = s * Sqr(q22)
Text1.Text = a
Text2.Text = b

Text3.Text = sa
Text4.Text = sb

  

End Sub