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How to create a list of permutations and combinations?
I have a matrix, 6 columns x 2 rows, which contains letter codes. Example:
A C E R Q L B D K S P N Each column is a choice; that is, either A or B; either C or D, etc. I need to create a list of all possible permutations. There are 64 permutations, e.g. ACERQL ACERQN ACERPL ACERPN etc. The letters in my 12 cells sometimes change based on formulas elsewhere in the document, so the list needs to change with them. To make things even more complicated, some columns will sometimes have THREE choices in them instead of two (again, changing based on formulas), so the ideal answer would enable me to deal with those cases automatically. 
#2




Answer: How to create a list of permutations and combinations?
To create a list of all possible permutations and combinations from your matrix, you can use the "Combin" and "Permut" functions in Excel. Here are the steps to do it:
By following these steps, you should be able to create a list of all possible permutations and combinations from your matrix, even if the choices change based on formulas elsewhere in the document.
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#3
Posted to microsoft.public.excel.misc




How to create a list of permutations and combinations?
Actually it seems to me that the first letter could be anything from A to Z
and so on. So how do you determine what the possible choices are at any given position. Also, I don't follow how the second line fits into the problem B D K.....? Also, you say there are 64 permutations but then you say some items can have 3 choices, in which case how do you come to 64?  If this helps, please click the Yes button. Cheers, Shane Devenshire "Malcolm" wrote: I have a matrix, 6 columns x 2 rows, which contains letter codes. Example: A C E R Q L B D K S P N Each column is a choice; that is, either A or B; either C or D, etc. I need to create a list of all possible permutations. There are 64 permutations, e.g. ACERQL ACERQN ACERPL ACERPN etc. The letters in my 12 cells sometimes change based on formulas elsewhere in the document, so the list needs to change with them. To make things even more complicated, some columns will sometimes have THREE choices in them instead of two (again, changing based on formulas), so the ideal answer would enable me to deal with those cases automatically. 
#4
Posted to microsoft.public.excel.misc




How to create a list of permutations and combinations?
Try this code
Public InStrings Public Combo() As Variant Public RowCount Public ComboLen Sub combinations() InStrings = Array("ACERQL", "BDKSPN") ComboLen = Len(InStrings(0)) ReDim Combo(0 To (ComboLen  1)) Level = 1 RowCount = 1 Call Recursive(Level) End Sub Sub Recursive(ByVal Level As Integer) For i = 0 To UBound(InStrings) Combo(Level  1) = Mid(InStrings(i), Level, 1) If Level = ComboLen Then For ColCount = 1 To ComboLen Sheets("Sheet1").Cells(RowCount, ColCount) = Combo(ColCount  1) Next ColCount RowCount = RowCount + 1 Else Call Recursive(Level + 1) End If Next i End Sub "Malcolm" wrote: I have a matrix, 6 columns x 2 rows, which contains letter codes. Example: A C E R Q L B D K S P N Each column is a choice; that is, either A or B; either C or D, etc. I need to create a list of all possible permutations. There are 64 permutations, e.g. ACERQL ACERQN ACERPL ACERPN etc. The letters in my 12 cells sometimes change based on formulas elsewhere in the document, so the list needs to change with them. To make things even more complicated, some columns will sometimes have THREE choices in them instead of two (again, changing based on formulas), so the ideal answer would enable me to deal with those cases automatically. 
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