Combinaciones y permutacionesP1.-Ingresa las letras C o P en A1 (C = combinaciones, P = permutaciones)52.-Grupo de combinaciones o permutaciones que desee.E3.-Coloque sus datos de forma vertical, un carcter por celda.XCNOTA:Nmero de Resultados120ELLos resultados apareceran a la izquierda de esta hoja

PROCESAR

Attribute VB_Name = "Module1"Option Explicit

Dim vAllItems As VariantDim Buffer() As StringDim BufferPtr As LongDim Results As Worksheet'' Posted by Myrna Larson' July 25, 2000' Microsoft.Public.Excel.Misc' Subject: Combin''Since you asked, here it is. It is generic, i.e. it isn't written specifically'for a given population and set size, as yours it. It will do permutations or'combinations. It uses a recursive routine to generate the subsets, one routine'for combinations, a different one for permutations.

'To use it, you put the letter C or P (for combinations or permutations) in a'cell. The cell below that contains the number of items in a subset. The Cells'below are a list of the items that make up the population. They could be'numbers, letters and symbols, or words, etc.

'You select the top cell, or the entire range and run the sub. The subsets are'written to a new sheet in the workbook.''

Sub ListPermutations() Dim Rng As Range Dim PopSize As Integer Dim SetSize As Integer Dim Which As String Dim N As Double Const BufferSize As Long = 4096Range("A1").Select Set Rng = Selection.Columns(1).Cells If Rng.Cells.Count = 1 Then Set Rng = Range(Rng, Rng.End(xlDown)) End If

PopSize = Rng.Cells.Count - 2 If PopSize < 2 Then GoTo DataError

SetSize = Rng.Cells(2).Value If SetSize > PopSize Then GoTo DataError

Which = UCase$(Rng.Cells(1).Value) Select Case Which Case "C" N = Application.WorksheetFunction.Combin(PopSize, SetSize) Case "P" N = Application.WorksheetFunction.Permut(PopSize, SetSize) Case Else GoTo DataError End Select If N > Cells.Count Then GoTo DataError

Application.ScreenUpdating = False

Set Results = Worksheets.Add

vAllItems = Rng.Offset(2, 0).Resize(PopSize).Value ReDim Buffer(1 To BufferSize) As String BufferPtr = 0

If Which = "C" Then AddCombination PopSize, SetSize Else AddPermutation PopSize, SetSize End If vAllItems = 0

Application.ScreenUpdating = True Exit Sub

DataError: If N = 0 Then Which = "Enter your data in a vertical range of at least 4 cells. " _ & String$(2, 10) _ & "Top cell must contain the letter C or P, 2nd cell is the number " _ & "of items in a subset, the cells below are the values from which " _ & "the subset is to be chosen."

Else Which = "This requires " & Format$(N, "#,##0") & _ " cells, more than are available on the worksheet!" End If MsgBox Which, vbOKOnly, "DATA ERROR" Exit SubEnd Sub

Private Sub AddPermutation(Optional PopSize As Integer = 0, _ Optional SetSize As Integer = 0, _ Optional NextMember As Integer = 0)

Static iPopSize As Integer Static iSetSize As Integer Static SetMembers() As Integer Static Used() As Integer Dim i As Integer

If PopSize 0 Then iPopSize = PopSize iSetSize = SetSize ReDim SetMembers(1 To iSetSize) As Integer ReDim Used(1 To iPopSize) As Integer NextMember = 1 End If

For i = 1 To iPopSize If Used(i) = 0 Then SetMembers(NextMember) = i If NextMember iSetSize Then Used(i) = True AddPermutation , , NextMember + 1 Used(i) = False Else SavePermutation SetMembers() End If End If Next i

If NextMember = 1 Then SavePermutation SetMembers(), True Erase SetMembers Erase Used End If

End Sub 'AddPermutation

Private Sub AddCombination(Optional PopSize As Integer = 0, _ Optional SetSize As Integer = 0, _ Optional NextMember As Integer = 0, _ Optional NextItem As Integer = 0)

Static iPopSize As Integer Static iSetSize As Integer Static SetMembers() As Integer Dim i As Integer

If PopSize 0 Then iPopSize = PopSize iSetSize = SetSize ReDim SetMembers(1 To iSetSize) As Integer NextMember = 1 NextItem = 1 End If

For i = NextItem To iPopSize SetMembers(NextMember) = i If NextMember iSetSize Then AddCombination , , NextMember + 1, i + 1 Else SavePermutation SetMembers() End If Next i

If NextMember = 1 Then SavePermutation SetMembers(), True Erase SetMembers End If

End Sub 'AddCombination

Private Sub SavePermutation(ItemsChosen() As Integer, _ Optional FlushBuffer As Boolean = False)

Dim i As Integer, sValue As String Static RowNum As Long, ColNum As Long

If RowNum = 0 Then RowNum = 1 If ColNum = 0 Then ColNum = 1

If FlushBuffer = True Or BufferPtr = UBound(Buffer()) Then If BufferPtr > 0 Then If (RowNum + BufferPtr - 1) > Rows.Count Then RowNum = 1 ColNum = ColNum + 1 If ColNum > 256 Then Exit Sub End If

Results.Cells(RowNum, ColNum).Resize(BufferPtr, 1).Value _ = Application.WorksheetFunction.Transpose(Buffer()) RowNum = RowNum + BufferPtr End If

BufferPtr = 0 If FlushBuffer = True Then Erase Buffer RowNum = 0 ColNum = 0 Exit Sub Else ReDim Buffer(1 To UBound(Buffer)) End If

End If

'construct the next set For i = 1 To UBound(ItemsChosen) sValue = sValue & ", " & vAllItems(ItemsChosen(i), 1) Next i

'and save it in the buffer BufferPtr = BufferPtr + 1 Buffer(BufferPtr) = Mid$(sValue, 3)End Sub 'SavePermutation

Attribute VB_Name = "Sheet1"Attribute VB_Base = "0{00020820-0000-0000-C000-000000000046}"Attribute VB_GlobalNameSpace = FalseAttribute VB_Creatable = FalseAttribute VB_PredeclaredId = TrueAttribute VB_Exposed = TrueAttribute VB_TemplateDerived = FalseAttribute VB_Customizable = True

Attribute VB_Name = "ThisWorkbook"Attribute VB_Base = "0{00020819-0000-0000-C000-000000000046}"Attribute VB_GlobalNameSpace = FalseAttribute VB_Creatable = FalseAttribute VB_PredeclaredId = TrueAttribute VB_Exposed = TrueAttribute VB_TemplateDerived = FalseAttribute VB_Customizable = True