Question

Error when using Bubble Sort for Array

Asked by: JakeBushnell

Hello, I am trying to do a basic bubble sort for my multi dimensional array in Excell. I am getting an error that says "Subscript out of range" on line 12.

Does any one know what the problem is here?

My array has 4 columns and about 56 rows.
Thank you,
Jacob Bushnell

Function BubbleSort(TempArray As Variant)
          Dim Temp As Variant
          Dim i As Integer
          Dim NoExchanges As Integer
 
          ' Loop until no more "exchanges" are made.
          Do
              NoExchanges = True
 
              ' Loop through each element in the array.
              For i = 1 To UBound(TempArray) - 1
 
                  ' If the element is greater than the element
                  ' following it, exchange the two elements.
                  If TempArray(i) > TempArray(i + 1) Then
                      NoExchanges = False
                      Temp = TempArray(i)
                      TempArray(i) = TempArray(i + 1)
                      TempArray(i + 1) = Temp
                  End If
              Next i
          Loop While Not (NoExchanges)
 
      End Function

                                  
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Asked On
2009-08-04 at 13:05:15ID24626083
Topic

Microsoft Excel Spreadsheet Software

Participating Experts
2
Points
500
Comments
8

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Answers

 

by: tilak_buddyPosted on 2009-08-04 at 14:03:42ID: 25018134

What is the value of TempArray???

Thats is why error prompting in Ubound(TempArray) below line

For i = 1 To UBound(TempArray) - 1

 

by: patrickabPosted on 2009-08-04 at 15:14:55ID: 25018726

JakeBushnell,

Which UBound (upper boundary) are you referring to in this VBA code phrase:

UBound(TempArray)

After all you say that the array is 2 dimensional, 4 x 56 and yet you haven't specified the what upper boundary you want to count - 1, 2, 3 or 4. When declaring the array I assume you declared it as:

Dim TempArray(4, 56) As Variant

Unless you are populating each of the 4 elements of the array equally it is possible that they are not the same. If the array is full (56 items) then you don't need to use Ubound(TempArray) at all.

Patrick

 

by: JakeBushnellPosted on 2009-08-04 at 17:07:32ID: 25019348

Sorry for the delay, The column I want is 1. so I changed line 11 to:

For i = 1 To UBound(TempArray, 1) - 1

And that fixed that line.

Now line 15 gives me the same error.

But it's not asking for a column there is it?

 

by: JakeBushnellPosted on 2009-08-04 at 17:32:07ID: 25019446

Ok, I got it sorting now but it only sorts the one column. The other records  are unchanged. I do I get it to move the other records along with it?
Thank you,
Jacob Bushnell

    Function BubbleSort(TempArray As Variant)
          Dim Temp As Variant
          Dim i As Integer
          Dim NoExchanges As Integer
 
          ' Loop until no more "exchanges" are made.
          Do
              NoExchanges = True
 
              ' Loop through each element in the array.
              For i = 1 To UBound(TempArray, 1) - 1
 
                  ' If the element is greater than the element
                  ' following it, exchange the two elements.
                
                 
                  If TempArray(i, 1) > TempArray(i + 1, 1) Then
                      NoExchanges = False
                      Temp = TempArray(i, 1)
                      TempArray(i, 1) = TempArray(i + 1, 1)
                      TempArray(i + 1, 1) = Temp
                  End If
              Next i
          Loop While Not (NoExchanges)
 
      End Function

                                              
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by: patrickabPosted on 2009-08-05 at 01:24:51ID: 25021144

Sort them in parallel. Move the other elements within the loop each time you move the element in array 1. The only thing is that you don't need to test the other elements.

Temp = TempArray(i, 2)
TempArray(i, 2) = TempArray(i + 1, 2)
TempArray(i + 1, 2) = Temp

Temp = TempArray(i, 3)
TempArray(i, 3) = TempArray(i + 1, 3)
TempArray(i + 1, 2) = Temp

Temp = TempArray(i, 4)
TempArray(i, 4) = TempArray(i + 1, 4)
TempArray(i + 1, 2) = Temp

 

by: JakeBushnellPosted on 2009-08-05 at 11:17:09ID: 25026413

Awesome! Thank you so much for your help!!!!
Jacob

 

by: patrickabPosted on 2009-08-05 at 13:13:45ID: 25027614

Jacob,

Thanks for the grade. Pleased it solved the problem - by the way I trust you spotted my array numbering errors. I believe it should have been:

Temp = TempArray(i, 2)
TempArray(i, 2) = TempArray(i + 1, 2)
TempArray(i + 1, 2) = Temp

Temp = TempArray(i, 3)
TempArray(i, 3) = TempArray(i + 1, 3)
TempArray(i + 1, 3) = Temp

Temp = TempArray(i, 4)
TempArray(i, 4) = TempArray(i + 1, 4)
TempArray(i + 1, 4) = Temp

Regards

Patrick

 

by: JakeBushnellPosted on 2009-08-08 at 12:55:42ID: 25051460

yeah, I figured it out. but the jist of it worked fine..  ;)

20120131-EE-VQP-002

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