Apply Math to all Numerical Values Embedded in Text With VBA & Regular Expressions

Apply Math to all Numerical Values Embedded in Text With VBA & Regular Expressions

What This VBA Code Does

This VBA code will use the power of Regular Expressions to parse through text and pluck all numerical values out of the text. It then allows you to manipulate these numbers (ie apply mathematical operations) and place the modified numbers back into the text.

Based on your specific needs, you may need to adjust the regular expression rule.

Search & Modify Numbers Only

Sub ModifyNumbersInText()
'PURPOSE: Add 30 to all numerical values in a given text
'SOURCE: www.TheSpreadsheetGuru.com/the-code-vault

Dim txt As String
Dim NumbersFound As String
Dim NumberArray As Variant

txt = "I want 50 peaches and 25 walnuts"

'Use Regular Expressions to pull out numbers
  Set objRegEx = CreateObject("VBScript.RegExp")
  objRegEx.IgnoreCase = True
  objRegEx.Global = True
  
  objRegEx.Pattern = "\d+" 'grab one or more digits
  
  If objRegEx.Test(txt) Then
    Set Result = objRegEx.Execute(txt)
      If Result.Count > 0 Then
        For Each Match In Result
          NumbersFound = NumbersFound & ";" & Match.Value
        Next Match
      End If
  End If

'Create Array out of Numbers Found
  NumbersFound = Right(NumbersFound, Len(NumbersFound) - 1)
  NumberArray = Split(NumbersFound, ";")
  
'Find/Replace (add 30)
  For x = LBound(NumberArray) To UBound(NumberArray)
    txt = Replace(txt, NumberArray(x), NumberArray(x) + 30)
  Next x

'Output result
  MsgBox txt

End Sub

Handle Numbers with Commas (ie "1,000")

Sub ModifyNumbersInText()
'PURPOSE: Divide all numbers in text by 1,000 (handles commas within numbers)
'SOURCE: www.TheSpreadsheetGuru.com/the-code-vault

Dim txt As String
Dim NumbersFound As String
Dim orgNumberArray As Variant
Dim newNumberArray As Variant

txt = "I want 1,000 peaches and 25,000 walnuts"

'Use Regular Expressions to pull out numbers
  Set objRegEx = CreateObject("VBScript.RegExp")
  objRegEx.IgnoreCase = True
  objRegEx.Global = True
  
  objRegEx.Pattern = "(?:^|\s)((?:\d*\.)?\d+|\d{1,3}(?:,\d{3})*(?:\.\d+)?)(?!\S)" 'grab one or more digits
  
  If objRegEx.Test(txt) Then
    Set Result = objRegEx.Execute(txt)
      If Result.Count > 0 Then
        For Each Match In Result
          NumbersFound = NumbersFound & ";" & Match.Value
        Next Match
      End If
  End If

'Create Array out of Numbers Found
  NumbersFound = Right(NumbersFound, Len(NumbersFound) - 1)
  orgNumberArray = Split(NumbersFound, ";")
  
'Remove Commas and Create Array
  NumbersFound = Replace(NumbersFound, ",", "")
  newNumberArray = Split(NumbersFound, ";")

'Find/Replace
  For x = LBound(orgNumberArray) To UBound(orgNumberArray)
    txt = Replace(txt, Trim(orgNumberArray(x)), Trim(newNumberArray(x)) / 100 & "K")
  Next x

'Output result
  MsgBox txt

End Sub

How Do I Modify This To Fit My Specific Needs?

Chances are this post did not give you the exact answer you were looking for. We all have different situations and it's impossible to account for every particular need one might have. That's why I want to share with you: My Guide to Getting the Solution to your Problems FAST! In this article, I explain the best strategies I have come up with over the years to getting quick answers to complex problems in Excel, PowerPoint, VBA, you name it

I highly recommend that you check this guide out before asking me or anyone else in the comments section to solve your specific problem. I can guarantee 9 times out of 10, one of my strategies will get you the answer(s) you are needing faster than it will take me to get back to you with a possible solution. I try my best to help everyone out, but sometimes I don't have time to fit everyone's questions in (there never seem to be quite enough hours in the day!).

I wish you the best of luck and I hope this tutorial gets you heading in the right direction!

Chris "Macro" Newman :)