VB.NET Two Way Ranova Two Example

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Imports CenterSpace.NMath.Core
Imports CenterSpace.NMath.Stats

Namespace CenterSpace.NMath.Stats.Examples.VisualBasic

  ' A .NET example in VB.NET showing two-way ranova two.
  Public Class Form1
    Inherits System.Windows.Forms.Form

#Region " Windows Form Designer generated code "

    Public Sub New()
      MyBase.New()

      'This call is required by the Windows Form Designer.
      InitializeComponent()

      ' Read in data from a file. The file contains data for the following study*:
      '
      ' A researcher was interested in whether frequency of exposure to a 
      ' picture of an ugly or attractive person would influence one's liking
      ' for the photograph. In order to find out the researcher, at the start 
      ' of each class he taught, pinned a large photograph of an ugly and 
      ' attractive person in front of the class. At the end of the class period the
      ' students in the class were asked to rate on a 7 point liking scale the extent
      ' to which they found the persons depicted in the photos to be likeable on 
      ' a scale similar to the one below. 
      '
      '                  unlikeable -3 -2 -1 0 1 2 3 likeable
      '
      ' The psychologist posted the pictures at the start of each class period 
      ' and had the students rate their liking for the two pictures at the end
      ' of the lst class, again after 5 classes and finally again after 10 classes.
      ' Thus each student gave 3 ratings for each of the two photographs (after
      ' 1 exposure, 5 exposures and 10 exposures).
      Dim FileName As String = "..\\..\\TwoWayRanovaTwoExample.dat"
      Dim AnovaData As DataFrame = DataFrame.Load(FileName, True, False, " ", True)

      ' Class TwoWayRanovaTwo performs a balanced two-way analysis of variance with
      ' repeated measures on both factors. Multiple linear regression is used to 
      ' compute the RANOVA values. The constructor takes a DataFrame containing
      ' the data, the column indices of the two factors, and the column index of
      ' the data:
      Dim Anova As TwoWayRanovaTwo = New TwoWayRanovaTwo(AnovaData, 1, 2, 0)

      ' This example simply displays a traditional ANOVA table
      ' in a System.Windows.Forms.DataGrid object. The next few lines of
      ' code format the table contents.

      ' First retrieve the table to display. Class TwoWayRanovaTwoTable is
      ' a subclass of DataFrame.
      Dim AnovaTable As TwoWayRanovaTwoTable = Anova.RanovaTable

      ' Next, let's set the precision to three decimal places. Note that this
      ' does not actually change the numbers in the ANOVA table. It just
      ' determines how many decimal places are displayed when the table is
      ' converted to a string.
      Dim I As Integer
      For I = 1 To (AnovaTable.Cols - 1)
        CType(AnovaTable(I), DFNumericColumn).NumericFormat = "F3"
      Next

      ' Next convert the RANOVA table into a string. This has the effect of 
      ' formatting all the numbers so that they have three digits after the decimal
      ' point and all Double.NaN values are represented as a ".". (Some rows
      ' in the ANOVA table that do not have F statistic values or F statistic
      ' p-values associated with them. The cells that correspond to these rows
      ' and the F and P columns contain Double.NaN values.)
      Dim DisplayFrame As New DataFrame(AnovaTable.ToString(), True, True, ControlChars.Tab, False)

      ' Now display the RANOVA table in the DataGrid.
      DataGrid1.DataSource = DisplayFrame.ToDataTable()

      ' Results of the analysis indicated a main effect for the photo
      ' attractiveness, F = 147.00, p = 0.001 <= 0.05, with the attractive
      ' photo liked more than the ugly photo. There was no main effect for
      ' the frequency of exposure to the photo, F = .60, p = 0.579 > 0.05.
      ' There was a significant attractiveness of photo by frequency of 
      ' exposure interaction, F = 18.00, p = 0.003 <= 0.05.

    End Sub

    'Form overrides dispose to clean up the component list.
    Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
      If disposing Then
        If Not (components Is Nothing) Then
          components.Dispose()
        End If
      End If
      MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    Friend WithEvents DataGrid1 As System.Windows.Forms.DataGrid
    Friend WithEvents Label1 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.DataGrid1 = New System.Windows.Forms.DataGrid()
      Me.Label1 = New System.Windows.Forms.Label()
      CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).BeginInit()
      Me.SuspendLayout()
      '
      'DataGrid1
      '
      Me.DataGrid1.AllowSorting = False
      Me.DataGrid1.BackgroundColor = System.Drawing.Color.White
      Me.DataGrid1.CaptionVisible = False
      Me.DataGrid1.DataMember = ""
      Me.DataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText
      Me.DataGrid1.Location = New System.Drawing.Point(24, 112)
      Me.DataGrid1.Name = "DataGrid1"
      Me.DataGrid1.PreferredColumnWidth = 110
      Me.DataGrid1.ReadOnly = True
      Me.DataGrid1.RowHeadersVisible = False
      Me.DataGrid1.Size = New System.Drawing.Size(664, 152)
      Me.DataGrid1.TabIndex = 0
      '
      'Label1
      '
      Me.Label1.Font = New System.Drawing.Font("Microsoft Sans Serif", 14.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
      Me.Label1.Location = New System.Drawing.Point(144, 24)
      Me.Label1.Name = "Label1"
      Me.Label1.Size = New System.Drawing.Size(336, 64)
      Me.Label1.TabIndex = 1
      Me.Label1.Text = "Two Way Anova Example With Repeated Measures On Both Factors"
      Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
      '
      'Form1
      '
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(706, 288)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label1, Me.DataGrid1})
      Me.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle
      Me.Name = "Form1"
      Me.Text = "Two Way Anova Example"
      CType(Me.DataGrid1, System.ComponentModel.ISupportInitialize).EndInit()
      Me.ResumeLayout(False)

    End Sub

#End Region

  End Class

End Namespace