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# Excel/random data selection

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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

[an error occurred while processing this directive]---------- 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

Questioner's Rating
 Rating(1-10) Knowledgeability = 10 Clarity of Response = 10 Politeness = 10 Comment Thank you very much!!! Works beautifuly and response time was fantastic - within an hour !!!! Can't say enough about your response. thanks again, George.

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This topic answers questions related to Microsoft Excel spreadsheet (or workbook) stand-alone or Mircrosoft Office Excel including Excel 2003, Excel 2007, Office 2000, and Office XP. You can get Excel help on Excel formulas(or functions), Excell macros, charting in Excel, advanced features, and the general use of Excel. This does not provide a general Excel tutorial nor the basics of using a spreadsheet. It provides specific answers to using Microsoft Excel only. If you do not see your Excel question answered in this area then please ask an Excel question here

#### Bob Umlas

##### Expertise

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/

##### Experience

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."

Publications
Excellence, The Expert, Microsoft

Education/Credentials
BA in math, Hofstra University, 1965

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

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