keep the solution in VBA - ms-access

Question

i am trying to get the frequency of terms within a collection of variable length strings.The context is descriptions in an Access database. Would prefer to keep the solution in VBA. Delimiter is " " (space) character
Dim db As DAO.Database
Set db = CurrentDb()
Call wordfreq
End Sub
Function wordfreq()
Dim myCol As Collection
Dim myArray() As String
Dim strArray As Variant
Dim strDescr, strTerm, strMsg As String
Dim i, j As Integer
Set myCol = New Collection
strDescr = "here it should accept the table and display the result in seperate table"
' db.Execute "select columns from table"
myArray = Split(strDescr, " ")
For Each strArray In myArray
On Error Resume Next
myCol.Add strArray, CStr(strArray)
Next strArray
For i = 1 To myCol.Count
strTerm = myCol(i)
j = 0
For Each strArray In myArray
If strArray = strTerm Then j = j + 1
Next strArray
'placeholder
strMsg = strMsg & strTerm & " --->" & j & Chr(10) & Chr(13)
Next i
'placeholder
'save results into a table
MsgBox strMsg
End Function

Answer 1

See an example below using a Scripting.Dictionary object.
Function wordfreq()
Dim objDict As Object
Dim myArray() As String
Dim strInput As String
Dim idx As Long
Set objDict = CreateObject("Scripting.Dictionary")
strInput = "here it should accept the table and display the result in seperate table"
myArray = Split(strInput, " ")
For idx = LBound(myArray) To UBound(myArray)
If Not objDict.Exists(myArray(idx)) Then
'Add to dictionary with a count of 1
objDict(myArray(idx)) = 1
Else
'Increment counter
objDict(myArray(idx)) = objDict(myArray(idx)) + 1
End If
Next
'Test it
Dim n As Variant
For Each n In objDict.Keys
Debug.Print "Word: " & n, " Count: " & objDict(n)
Next
End Function
Output:
'Word: here Count: 1
'Word: it Count: 1
'Word: should Count: 1
'Word: accept Count: 1
'Word: the Count: 2
'Word: table Count: 2
'Word: and Count: 1
'Word: display Count: 1
'Word: result Count: 1
'Word: in Count: 1
'Word: seperate Count: 1
Edit
The process:
Loop through the Input recordset.
Split the Description into words.
Check if the word exist in Dictionary and add or
increment.
Add the Keys (words) and Values (count) of the aforementioned
Dictionary to the Output table.
To achieve this two helper functions have been set up:
One loops through the description recordset and returns a
Dictionary object filled with unique words as Keys and their
count as Values.
The other takes the above Dictionaryobject and adds it to the Output table.
You need to change [TABLE] to the name of your Input and Output tables.
Option Explicit
Sub WordsFrequency()
On Error GoTo ErrTrap
Dim rs As DAO.Recordset
Set rs = CurrentDb().OpenRecordset("SELECT Description FROM [TABLE] WHERE Description Is Not Null;", dbOpenSnapshot)
If rs.EOF Then GoTo Leave
With rs
.MoveLast
.MoveFirst
End With
If AddDictionaryToTable(ToDictionary(rs)) Then
MsgBox "Completed successfully.", vbInformation
End If
Leave:
If Not rs Is Nothing Then rs.Close
Set rs = Nothing
On Error GoTo 0
Exit Sub
ErrTrap:
MsgBox Err.Description, vbCritical
Resume Leave
End Sub
' Returns Scripting.Dictionary object
Private Function ToDictionary(rs As DAO.Recordset) As Object
Dim d As Object 'Dictionary
Dim v As Variant 'Words
Dim w As String 'Word
Dim i As Long, ii As Long 'Loops
Set d = CreateObject("Scripting.Dictionary")
For i = 1 To rs.RecordCount
v = Split(rs![Description], " ")
For ii = LBound(v) To UBound(v)
w = Trim(v(ii))
If Not d.Exists(w) Then d(w) = 1 Else d(w) = d(w) + 1
Next
rs.MoveNext
Next
Set ToDictionary = d
End Function
' Adds Dictionary object to table
Private Function AddDictionaryToTable(objDict As Object) As Boolean
On Error GoTo ErrTrap
Dim rs As DAO.Recordset
Dim n As Variant
Set rs = CurrentDb().OpenRecordset("[TABLE]")
With rs
For Each n In objDict.Keys
.AddNew
.Fields("Words").Value = n
.Fields("Counts").Value = objDict(n)
.Update
Next
End With
'all good
AddDictionaryToTable = True
Leave:
If Not rs Is Nothing Then rs.Close
Set rs = Nothing
On Error GoTo 0
Exit Function
ErrTrap:
MsgBox Err.Description, vbCritical
Resume Leave
End Function