I need to pick 5 random numbers from a list

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budward

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Joined
Oct 27, 2006
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75
of 22 numbers. My example explains in more detail what I would like to do.
Thanks in advance for all the help I have received and continue to receive at this forum.
:) ...Bud
 

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Joined
Jul 28, 2006
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1,225
Hi Bud,

this macro does the job.
Code:
Sub RandomNumbers()
    Dim Src As Range, NextSet As Range
    Dim i As Long, j As Long, NumberOfSets As Long
    Dim n As Long
    
    Set Src = Range("A1:V1")
    NumberOfSets = Range("B4")
    For i = 1 To NumberOfSets
        Set NextSet = Range("D" & 3 + i).Resize(, 5)
        Randomize
        For j = 1 To 5
            n = Int(22 * Rnd(1)) + 1
            NextSet(j) = Src(n)
        Next j
        NextSet.Sort key1:=NextSet(1), Orientation:=xlLeftToRight
    Next i
End Sub
I assumed you want to put the number of random number sets into B4, instead of B1, as was indicated in the sample workbook. But if it's really B1 then the code must be modified, but I'm sure you can do that easily.

Also, please note that this macro does not check if there are identical number in a set, or if there are identical sets. This was not an explicit requirement, so I left it out for now. If you need something like this, it can be done, of course.

Jimmy
 

budward

Thread Starter
Joined
Oct 27, 2006
Messages
75
Thanks Jimmy,
You were right about B4 instead of B1.
If I can check for identical numbers in a set and identical sets, that would be awesome!
I am always amazed that no matter what idea I come up with, there is always someone who knows how to make it happen.
thanks again...bud
 
Joined
Jul 28, 2006
Messages
1,225
Bud,
here's the modified macro:

Code:
Sub RandomNumbers()
    Dim Src As Range, NextSet As Range
    Dim i As Long, j As Long, NumberOfSets As Long, n As Long, pos As Long
    Dim NextSetString As String, AllSetsString As String, s As String
    
    Randomize
    Set Src = Range("A1:V1")
    NumberOfSets = Range("B4")
[COLOR="Red"][B]    If NumberOfSets > 3160080 Then
        MsgBox "The requested number of sets is greater than the maximum possible."
        Exit Sub
    End If[/B][/COLOR]
    AllSetsString = ""
    i = 1
    While i < NumberOfSets + 1
[COLOR="SeaGreen"][B]        If i + 3 > Rows.Count Then
            MsgBox "There's no more rows on this sheet to place new sets. Exiting."
            Exit Sub
        End If[/B][/COLOR]
        Set NextSet = Range("D" & 3 + i).Resize(, 5)
        NextSetString = ""
        j = 0
        While j < 5
            n = Src(Int(22 * Rnd(1)) + 1)
            [COLOR="Blue"][B]s = Right(CStr(n + 100), 2)[/B][/COLOR]
            pos = InStr(NextSetString, s)
            If (pos = 0) Or (pos Mod 2 <> 1) Then
                j = j + 1
                NextSetString = NextSetString & s
                NextSet(j) = n
            End If
        Wend
        NextSet.Sort key1:=NextSet(1), Orientation:=xlLeftToRight
        NextSetString = ""
        For j = 1 To 5
            s = Right(CStr(NextSet(j) + 100000), 2)
            NextSetString = NextSetString & s
        Next
        pos = InStr(AllSetsString, NextSetString)
        If (pos = 0) Or (pos Mod 10 <> 1) Then i = i + 1
    Wend
End Sub
There are 3 imperfections in the code that I know of.
  • It works well only as long as all numbers in the list are >0 and <100, integers. (See the blue part of the code.)
  • Checking for the maximum possible number of different sets is hardcoded for 22 items inthe list.(See the red part of the code.)
  • If the requested number of set is greater than the number of rows on the sheet, the macro stops. (See the green part of the code.)

Jimmy
 
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