VB Two Way Ranova Two Example

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Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Imports CenterSpace.NMath.Core

Namespace CenterSpace.NMath.Examples.VisualBasic

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

#Region " Windows Form Designer generated code "

    Public Sub New()

      This call is required by the Windows Form Designer.

      Add any initialization after the InitializeComponent() call

      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 ones 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 AnovaData As DataFrame = DataFrame.Load("TwoWayRanovaTwoExample.dat", 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, lets 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 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
        End If
      End If
    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.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
      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
      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()

    End Sub

#End Region

  End Class

End Namespace

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