Macro to replace old codes with new codes

I don't understand the question.

Agree totally unclear

gowflow

Yes, even with the attached spreadsheet, I too am confused.

Can you simply post only what you have currently.
Then post what you need the result to be
Then explain, clearly and precisely, how you got from what you have, to what you want.

see worksheets
"Original data"
"desired results"

Thks

Code-Replacements--Details-.xls

Sorry you did not explain anything it is still totally unclear !!

how do you go from Code 1 and Code 2 TO Code 1.1 and Code 2.1 there is no logic in the values can you explain by taking an example for us to understand.

gowflow

I can see no logical process for getting the ".1" values either...
In the first row Code 1 is 1 and code 2 is 5.
If you concatenate them (=P2&Q2) you get 15 (the value in Code 1.1)
...but I can't see any other rational explanations for the other ".1" values...?

Are you sure you have been given the correct datasets?

Can you contact the source of this data and see if they have an explanation?

@Jeffrey
I think it is not the first nor the last mystery for OP am hanged on an other question that is no different despite numerous question marks seems we are in a deadlock !!!

:)
gowflow

OK,

Let us know how you would like to proceed.

sorry there seems to be some misunderstanding.

There is absolutely no logic in the values.
As long as in code1 and code2 is 1 and 5, then it will change to 15 and 104.
As long as code1 and code2 is 1 and 6, then it will change to 15 and 82.

The code1.1 and Code2.1 are new codes to replace the old codes, so everything in old has to map to new.

but instead of replacing directly into column E and F, just place it in column L and M so that I can see the change.

hope this is clear.

Sorry, we are all still lost so lets keep this simple...
You are giver some values
Code1      Code2
1      5
1      5
1      5
1      5
3      5
3      5
3      5
3      4
3      4
3      17
3      18
3      9
3      16
185      14
186      24
186      25
183      105

Then you are looking for a formula that will convert those values to these values:
Code1.1      Code2.1
15      104
15      104
15      104
15      104
28      104
28      104
28      104
28      169
28      169
28      194
28      65
28      87
28      198
28      113
NA      NA
NA      NA
255      121

...is this correct?

ok here you are finally got what you want here is the code for that

Sub MapData()
Dim WSD As Worksheet
Dim WSM As Worksheet
Dim WSO As Worksheet
Dim MaxRowM As Long, MaxRowO As Long, MaxColO As Long, I As Long
Dim sSearch As String
Dim cCell As Range

'---> Disable Events
With Application
    .EnableEvents = False
    .ScreenUpdating = False
    .DisplayAlerts = False
End With

'---> Set Variables
Set WSM = Sheets("Mapping")
MaxRowM = WSM.Range("A" & WSM.Rows.Count).End(xlUp).Row
Set WSO = Sheets("Original data")
MaxRowO = WSO.Range("A" & WSO.Rows.Count).End(xlUp).Row
MaxColO = WSO.Columns(WSO.Columns.Count).End(xlToLeft).Column

On Error Resume Next
Set WSD = Sheets("Desired")
If Err <> 0 Then
    Set WSD = Worksheets.Add(after:=Worksheets(Worksheets.Count))
    WSD.Name = "Desired"
End If
On Error GoTo 0
WSD.Cells.Delete


'---> Create Col C as Concatenate A+B / G as E+F
WSM.Range("C2:C" & MaxRowM).Formula = "=CONCATENATE(A2,B2)"
WSM.Range("G2:G" & MaxRowM).Formula = "=CONCATENATE(E2,F2)"

'---> Loop thru Original
WSO.Range(WSO.Range("A1"), WSO.Cells(MaxRowO, MaxColO)).Copy WSD.Range("A1")

For I = 2 To MaxRowO
    sSearch = WSD.Range("E" & I) & WSD.Range("F" & I)
    Set cCell = WSM.Range("C1:C" & MaxRowM).Find(what:=sSearch, LookIn:=xlValues, lookat:=xlWhole, MatchCase:=False)
    If Not cCell Is Nothing Then
        WSD.Range("L" & I) = WSM.Cells(cCell.Row, "E")
        WSD.Range("M" & I) = WSM.Cells(cCell.Row, "F")
    End If
Next I

WSM.Range("C:C").ClearContents
WSM.Range("G:G").ClearContents

'---> Enable Events
With Application
    .EnableEvents = True
    .ScreenUpdating = True
    .DisplayAlerts = True
End With

MsgBox "Mapping Done !", vbExclamation

End Sub

Select allOpen in new window

In the attached workbook I created a sheet called Mapping pls respect the was columns are and do not change them. Like original in A,B and Mapped in E,F

When oyu activate the macro it will look for data in sheet Original Data and do a mapping and give you the results in a new sheet that it will create called: Desired.

pls chk and let me know.
the workbook has everything.

gowflow
Code-Replacements--Details-V01.xlsm

I'll look at this tonight unless another Expert chimes in.

in response to message in ID: 40598725 >> Yes Jeffery, you are right.

in response to message in ID: 40599346 >> thks gowflow.
it works.
But could you tweak the macro such that:
1. row 1 also has the corresponding data in column L and M as my original data does not have headers so the data starts from row 1.
2. the macro works even without the worksheet "Mapping" and also without renaming the worksheet that contains the data to "Original Data"

because i retrieve the data from text file every month and i have to convert the text file into excel and then map the old codes to new codes.

If 1. and 2. can be done, then i can place the macro in personal.xlsb and run it every month.

Data--from-text-.xlsx
Data (from text).xlsx  - shows the result when running your macro - worksheet "Desired"

Data--from-text--1.xlsx
Data (from text) 1.xlsx - shows my data that is originally derived from text and save as xlsx.

So...
Problem solved?

Ok i have raised separate question in :

https://www.experts-exchange.com/questions/28616285/Macro-to-replace-old-codes-with-new-codes-II.html

See extension of question in :
https://www.experts-exchange.com/questions/28616285/Macro-to-replace-old-codes-with-new-codes-II.html