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Excel/random data selection

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Question
QUESTION: Bob;
you've helped me before, which i am so grateful for!
Hope you can help me again. I have a spreadsheet with 3 columns
Col A - operator ID, Col B - claim number and Col C - date.
The sheet is sorted in Operator ID order. I need a routine - Macro, preferably, which would randomly select 3 claims for each operator (non-repeating) and if possible, create a new worksheet of this random selection. So i will end up with 3 random records for each operator (consisting of all 3 columns, A,B,C).
your help is ALWAYS much appreciated!
George.

ANSWER: Sub ThreeOfEach()
   Set curr = ActiveSheet
   Set sel = Selection
   Range("D1:E1").Value = 0
   Range("D2:D" & Range("A65000").End(xlUp).Row) = [row(1:65000)]
   Range("E2:E" & Range("A65000").End(xlUp).Row).FormulaR1C1 = "=rc1&rand()"
   [a1].CurrentRegion.Sort key1:=[e2], order1:=xlAscending
   Worksheets.Add
   Set nw = ActiveSheet
   curr.Range("A1:C4").Copy Range("A1")
   i = 2
   Do
       n = curr.Columns(1).Find(curr.Cells(i, 1).Value, searchdirection:=xlPrevious).Row
       n = n + 1
       If curr.Cells(n, 1).Value = "" Then GoTo es
       curr.Cells(n, 1).Resize(3, 3).Copy Cells(Range("A60000").End(xlUp).Row + 1, 1)
       i = n
   Loop
es:
   curr.Activate
   [a1].CurrentRegion.Sort key1:=[d2], order1:=xlAscending
   Range("D:E").Delete
   nw.Activate
   Columns.AutoFit
End Sub


---------- FOLLOW-UP ----------

QUESTION: Bob;
this is the macro you gave me in January and it works great and we are using it every week. Now, is there a way to modify the macro to instead of selecting 3 random claims for each operator; to select a set percentage of random claims for each operator: e.g.: 20% of random claims for each operator. Your help is greatly appreciated!!!
George.

Answer
Sub APercentOfEach()
   Dim arr()
   Dim arrcount As Integer
   Set curr = ActiveSheet
   Set sel = Selection
   pct = Application.InputBox("What percent?", Type:=1)
   If pct > 100 Or pct = 0 Then
       MsgBox "Enter a value between 1 and 100"
       Exit Sub
   End If
   Range("D1:E1").Value = 0
   Range("D2:D" & Range("A65000").End(xlUp).Row) = [row(1:65000)]
   Range("E2:E" & Range("A65000").End(xlUp).Row).FormulaR1C1 = "=rc1&rand()"
   Range("F2:F" & Range("A65000").End(xlUp).Row).FormulaR1C1 = "=INT(" & pct / 100 & "*COUNTIF(c1,rc1))"
   [a1].CurrentRegion.Sort key1:=[e2], order1:=xlAscending
   num = [f2].Value
   [g2].FormulaArray = "=match(true,offset(A2,1,0,1000,1)<>A2,0)"
   nx = [g2].Value
   [g2].Copy
   Set g = [g2]
   ReDim Preserve arr(1)
   arr(1) = 2
   arrcount = 1
   Do
       Set g = g.Offset(nx)
       arrcount = arrcount + 1
       ReDim Preserve arr(arrcount)
       arr(arrcount) = g.Row
       g.PasteSpecial
       If Application.IsNA(g) Then Exit Do
       nx = g.Value
       g.Copy
   Loop
   Worksheets.Add
   Set nw = ActiveSheet
   For i = 1 To arrcount - 1
       numtocopy = curr.Cells(arr(i), 6).Value
       If i = 1 Then numtocopy = numtocopy + 1
       curr.Cells(IIf(i = 1, 1, arr(i)), 1).Resize(numtocopy, 3).Copy Range("A60000").End(xlUp).Offset(1)
   Next
   Rows(1).Delete
   [d1].Value = pct & "% of operators represented."
es:
   curr.Activate
   [a1].CurrentRegion.Sort key1:=[d2], order1:=xlAscending
   Range("D:G").Delete
   nw.Activate
   Columns.AutoFit
End Sub

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Bob Umlas

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I`m a Microsoft Excel MVP (Most Valuable Professional) and have been since the inception of the program in 1995. I can answer every kind of Excel question except: API, Importing/exporting to other programs (powerpoint, word,...) Also check out my in-person training link at http://www.thumbtack.com/ny/new-york/excel-training/

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Worked with MS Excel since version 0.99 (on the Mac!). Was contributing editor to Excellence Magazine, having written >300 articles. John Walkenbach said of me "I finally met someone who knows as much about Excel as I do."

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Excellence, The Expert, Microsoft

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BA in math, Hofstra University, 1965

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MVP
Led sessions for the Convergence 2004-2006 seminar on Excel tips & tricks

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