Random Selection of Row Numbers from a Filtered Range

Hi,

I found the below link by Tushar Mehta on Random Selection

Here's my code where i'm trying to incorporate some code from the above link.

Sub RandomFilter()
Dim p As String
Dim wsM As Worksheet
Dim rndRowRng(), rndRowSamples() As Variant
Dim rngVSR, rngFR As Range
Dim i, x, rowNum As Integer
Dim vCol, fCol, LR, vCellCount, randRow, A As Long
Application.ScreenUpdating = False
Set wsM = Sheets("TestRandom")
With wsM
vCol = .Rows(1).Find("DATA1", LookIn:=xlValues, LookAt:=xlWhole).Column
fCol = .Cells(1, .Columns.Count).End(xlToLeft).Column + 1
LR = .Cells(.Rows.Count, vCol).End(xlUp).Row
.Cells(1, fCol) = "Flag"
.Range(.Cells(2, fCol), .Cells(LR, fCol)).FormulaR1C1 = "=ROW()-1"
 
ReDim rndRowRng(2 To LR) As Variant
ReDim rndRowSamples(2 To LR) As Variant
For i = 1 To 10
.Columns("A:J" & Cells(Rows.Count, 1)).AutoFilter field:=1, Criteria1:="=" & i
If .FilterMode Then
With .AutoFilter.Range
Set rngVSR = .Columns(1).Offset(1, 0).Resize(.Rows.Count - 1, 1).SpecialCells(xlCellTypeVisible)
End With
Else
MsgBox "Filters not Set." & vbLf & "Processing Terminated."
Exit Sub
End If
vCellCount = rngVSR.Cells.Count
p = InputBox("Enter Sheet Name: ", "User Type")
Randomize
If p = "New" Then
randRow = Int(vCellCount * (5 / 100))
ElseIf p = "Existing" Then
randRow = Int(vCellCount * (2.5 / 100))
End If
For rowNum = 2 To LR
rndRowRng(i) = rngVSR.Cells(i, 9).Value
Next rowNum
ReDim Preserve rndRowRng(2 To LR) As Variant
 
' Invoke Tushar Mehta's code here
 
For x = LBound(rndRowSamples) To UBound(rndRowSamples)
With Range("A1:J" & Cells(Rows.Count, fCol).End(xlUp).Row)
.Resize(.Rows.Count - 1, 1).Offset(i, .Cells(x, 10)).SpecialCells(xlCellTypeVisible) = "Sample_" & i
End With
Next x
Erase rndRowRng
.Columns("A:J" & Cells(Rows.Count, 1)).AutoFilter
Next i
End With
End Sub

Using .FormulaR1C1 = "=ROW()-1" shows row numbers in a column.
After applying filter to DATA1 column in the sheet, i want to read the visible row numbers and store it in an array.

I'm trying to include the RandomSelect method below (from the above link) to select random row numbers by mixing the (above mentioned) array and mark the selected array elements. The randRow variable contains the number of rows to be chosen from the array.

Return a specified number of random values from an user specified array

 
Sub Swap(ByRef Arr() As Variant, ByVal i As Long, ByVal j As Long)
Dim temp As Variant
temp = Arr(i): Arr(i) = Arr(j): Arr(j) = temp
End Sub
 
Sub RandomSelect(ByRef Arr() As Variant, ByVal N As Long)
Dim z As Long, Idx As Long
'Need edits to ensure Arr is an acceptable data type. Similarly, validate n
For z = 1 To N
Idx = LBound(Arr) + (z - 1) + Int((UBound(Arr) - (LBound(Arr) + (z - 1)) + 1) * Rnd())
Swap Arr, LBound(Arr) + (z - 1), Idx
Next z
End Sub

I'm not able to incorporate and invoke the above module. Can someone help me incorporating it??

Sarang