finding the closest matching date in a range

dinotom

Active Member
Joined
Aug 2, 2009
Messages
357
Hello,

What is the fastest way to search a column of dates to find the closest date to a date passed as a parameter to the routine?

I am doing it by looping thru each cell in the range but Im sure there is a faster way
 

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sulakvea

Well-known Member
Joined
Jul 2, 2008
Messages
994
and if sorting the data is an option - here it is

replace DateVal = 25 line with whatever procedure you use to pass the value along. DateVal is that number (date in your case) that you wanna find the closest match for.
assumes data sits in Col A1:A1000

Rich (BB code):
Sub FindClosestMatch()

DateVal = 25

Range("A1:A1000").Sort Key1:=Range("A1"), Order1:=xlDescending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
MinVal = Cells(Application.WorksheetFunction.Match(DateVal, Range("A1:A1000"), -1), 1)

Range("A1:A1000").Sort Key1:=Range("A1"), Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, Orientation:=xlTopToBottom, _
DataOption1:=xlSortNormal
MaxVal = Cells(Application.WorksheetFunction.Match(DateVal, Range("A1:A1000"), 1), 1)

If MinVal - DateVal > DateVal - MaxVal Then
 FinalVal = MaxVal
Else
 FinalVal = MinVal
End If
MsgBox (FinalVal)

End Sub
 

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