Solution to count how many elements many data sets have in common

bazuca

New Member
Joined
Jun 2, 2018
Messages
2
Hi everyone,

I am finding myself in this problem I can't solve.

I have 150 sets, each of which has multiple element inside i.e.

Set A
-1
-2
-3
-4

Set B
-1
-3
-10
-20

etc.

Now, I would like to create a matrix with the sets in rows and colum and for each intersecation I woudl like to count how many things the 2 sets have in common.

In this way, each set will have, in the intersecation with itself, all its element in common.

Is there a solution (vba included) to do this?

Thanks in advance
 

Excel Facts

Why are there 1,048,576 rows in Excel?
The Excel team increased the size of the grid in 2007. There are 2^20 rows and 2^14 columns for a total of 17 billion cells.
Welcome to the forum.

Given this sheet:

Excel 2012
ABCD
Set ASet BSet CSet D

<colgroup><col style="width: 25pxpx"><col><col><col><col></colgroup><thead>
</thead><tbody>
[TD="align: center"]1[/TD]

[TD="align: center"]2[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-4[/TD]

[TD="align: center"]3[/TD]
[TD="align: right"]-2[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-41[/TD]

[TD="align: center"]4[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-10[/TD]
[TD="align: right"]-10[/TD]
[TD="align: right"]-42[/TD]

[TD="align: center"]5[/TD]
[TD="align: right"]-4[/TD]
[TD="align: right"]-20[/TD]
[TD="align: right"]-30[/TD]
[TD="align: right"]-50[/TD]

[TD="align: center"]6[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]-41[/TD]
[TD="align: right"][/TD]

[TD="align: center"]7[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]-42[/TD]
[TD="align: right"][/TD]

</tbody>
Sheet1



This macro:

Code:
Sub Intersections()
Dim Dict() As Object, sht1 As Worksheet, sht2 As Worksheet, OutTab() As Variant
Dim lc As Long, r As Long, c As Long, ctr As Long, x As Variant

    Set sht1 = Sheets("Sheet1")
    Set sht2 = Sheets("Sheet2")
    
    sht2.Cells.ClearContents
    lc = sht1.Cells(1, Columns.Count).End(xlToLeft).Column
    ReDim Dict(1 To lc)
    ReDim OutTab(1 To lc + 1, 1 To lc + 1)
    
    For c = 1 To lc
        Set Dict(c) = CreateObject("Scripting.Dictionary")
        d1 = sht1.Cells(1, c).Resize(sht1.Cells(Rows.Count, c).End(xlUp).Row).Value
        For r = 2 To UBound(d1)
            Dict(c)(d1(r, 1)) = 1
        Next r
        OutTab(c + 1, 1) = d1(1, 1)
        OutTab(1, c + 1) = d1(1, 1)
    Next c
    
    For r = 1 To lc
        For c = r To lc
            If r = c Then
                ctr = Dict(c).Count
            Else
                ctr = 0
                For Each x In Dict(r)
                    If Dict(c).exists(x) Then ctr = ctr + 1
                Next x
            End If
            OutTab(r + 1, c + 1) = ctr
            OutTab(c + 1, r + 1) = ctr
        Next c
    Next r
    sht2.Range("A1").Resize(lc + 1, lc + 1) = OutTab
    
End Sub

will create this sheet:

Excel 2012
ABCDE
Set ASet BSet CSet D
Set A
Set B
Set C
Set D

<colgroup><col style="width: 25pxpx"><col><col><col><col><col></colgroup><thead>
</thead><tbody>
[TD="align: center"]1[/TD]
[TD="align: right"][/TD]

[TD="align: center"]2[/TD]

[TD="align: right"]4[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]1[/TD]

[TD="align: center"]3[/TD]

[TD="align: right"]2[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]0[/TD]

[TD="align: center"]4[/TD]

[TD="align: right"]2[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]2[/TD]

[TD="align: center"]5[/TD]

[TD="align: right"]1[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]4[/TD]

</tbody>
Sheet2



Let me know if this is what you're looking for.
 
Upvote 0
Welcome to the forum.

Given this sheet:

Excel 2012
ABCD
Set ASet BSet CSet D

<tbody>
[TD="align: center"]1[/TD]

[TD="align: center"]2[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-1[/TD]
[TD="align: right"]-4[/TD]

[TD="align: center"]3[/TD]
[TD="align: right"]-2[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-41[/TD]

[TD="align: center"]4[/TD]
[TD="align: right"]-3[/TD]
[TD="align: right"]-10[/TD]
[TD="align: right"]-10[/TD]
[TD="align: right"]-42[/TD]

[TD="align: center"]5[/TD]
[TD="align: right"]-4[/TD]
[TD="align: right"]-20[/TD]
[TD="align: right"]-30[/TD]
[TD="align: right"]-50[/TD]

[TD="align: center"]6[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]-41[/TD]
[TD="align: right"][/TD]

[TD="align: center"]7[/TD]
[TD="align: right"][/TD]
[TD="align: right"][/TD]
[TD="align: right"]-42[/TD]
[TD="align: right"][/TD]

</tbody>
Sheet1



This macro:

Code:
Sub Intersections()
Dim Dict() As Object, sht1 As Worksheet, sht2 As Worksheet, OutTab() As Variant
Dim lc As Long, r As Long, c As Long, ctr As Long, x As Variant

    Set sht1 = Sheets("Sheet1")
    Set sht2 = Sheets("Sheet2")
    
    sht2.Cells.ClearContents
    lc = sht1.Cells(1, Columns.Count).End(xlToLeft).Column
    ReDim Dict(1 To lc)
    ReDim OutTab(1 To lc + 1, 1 To lc + 1)
    
    For c = 1 To lc
        Set Dict(c) = CreateObject("Scripting.Dictionary")
        d1 = sht1.Cells(1, c).Resize(sht1.Cells(Rows.Count, c).End(xlUp).Row).Value
        For r = 2 To UBound(d1)
            Dict(c)(d1(r, 1)) = 1
        Next r
        OutTab(c + 1, 1) = d1(1, 1)
        OutTab(1, c + 1) = d1(1, 1)
    Next c
    
    For r = 1 To lc
        For c = r To lc
            If r = c Then
                ctr = Dict(c).Count
            Else
                ctr = 0
                For Each x In Dict(r)
                    If Dict(c).exists(x) Then ctr = ctr + 1
                Next x
            End If
            OutTab(r + 1, c + 1) = ctr
            OutTab(c + 1, r + 1) = ctr
        Next c
    Next r
    sht2.Range("A1").Resize(lc + 1, lc + 1) = OutTab
    
End Sub

will create this sheet:

Excel 2012
ABCDE
Set ASet BSet CSet D
Set A
Set B
Set C
Set D

<tbody>
[TD="align: center"]1[/TD]
[TD="align: right"][/TD]

[TD="align: center"]2[/TD]

[TD="align: right"]4[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]1[/TD]

[TD="align: center"]3[/TD]

[TD="align: right"]2[/TD]
[TD="align: right"]4[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]0[/TD]

[TD="align: center"]4[/TD]

[TD="align: right"]2[/TD]
[TD="align: right"]3[/TD]
[TD="align: right"]6[/TD]
[TD="align: right"]2[/TD]

[TD="align: center"]5[/TD]

[TD="align: right"]1[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]2[/TD]
[TD="align: right"]4[/TD]

</tbody>
Sheet2



Let me know if this is what you're looking for.

It does work like magic!!! Many thanks :))
 
Upvote 0

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