Return Consecutive Days Count or Zero

[Kimberly24]

Hello,
In Excel I have a Date column and a Flagged column. The flagged column is a "1" or a "0" based on information from a different source. I need to make a column that will return "0" if the flagged column is "0" BUT if the flagged column is "1" then I need it to return how many consecutive "1"'s are in that string.

DATE FLAGGED OUTPUT
1/1/2016 1 1
1/2/2016 0 0
1/3/2016 1 4
1/4/2016 1 4
1/5/2016 1 4
1/6/2016 1 4
1/7/2016 0 0
1/8/2016 0 0
1/9/2016 1 2
1/10/2016 1 2

I have reviewed some similar threads on the subject but I was not able to tweak them to match my exact needs yet. Thanks in advance for any assistance!
KC

 

[Oeldere]

if you show us the similar threads maybe we can solve your problem.

 

[Kimberly24]

I am not sure how to link threads on here, but I searched "Consecutive Day Count" and it returned several from the Excel Forum.

 

[Oeldere]

copy the adres from the adresbox and paste the link here.

 

[Rick Rothstein]

Can you make use of a macro? If so...

[table="width: 500"]
[tr]
	[td]Sub CountFlaggedDates()
  Dim X As Long, Flags() As String, Result() As String
  Flags = Split(Join(Application.Transpose(Range("B2", Cells(Rows.Count, "B").End(xlUp))), ""), 0)
  For X = 0 To UBound(Flags)
    Flags(X) = Replace(Flags(X), 1, " " & Evaluate(Replace(StrConv(Flags(X), vbUnicode), Chr(0), "+") & 0) & " ")
  Next
  Result = Split(Application.Trim(Join(Flags, " 0 ")))
  Range("C2").Resize(UBound(Result) + 1) = Application.Transpose(Result)
End Sub[/td]
[/tr]
[/table]

HOW TO INSTALL MACROs
------------------------------------
If you are new to macros, they are easy to install and use. To install it, simply press ALT+F11 to go into the VB editor and, once there, click Insert/Module on its menu bar, then copy/paste the above code into the code window that just opened up. That's it.... you are done. To use the macro, go back to the worksheet with your data on it and press ALT+F8, select the macro name (CountFlaggedDates) from the list that appears and click the Run button. The macro will execute and perform the action(s) you asked for. If you will need to do this again in this same workbook, and if you are using XL2007 or above, make sure you save your file as an "Excel Macro-Enabled Workbook (*.xlsm) and answer the "do you want to enable macros" question as "yes" or "OK" (depending on the button label for your version of Excel) the next time you open your workbook.

 

[MarcelBeug]

In C2 enter the following array formula, confirm with Ctrl+Shift+Enter and copy down:

=IF(B2=0,0,IFERROR(ROW()+MATCH(0,B2:INDEX(B:B,COUNTA(B:B)),0),2+COUNTA(B:B))-2-IF(COUNTIF(B$1:B2,0)=0,1,MAX(IF(B$1:B2=0,ROW(B$1:B2)))))

This formula is designed so any line deletions will not cause any ref errors.

 

[Kimberly24]

MarcelBeug - that worked, thank you!

 

[MarcelBeug]

You're welcome.

 

[Rick Rothstein]

In C2 enter the following array formula, confirm with Ctrl+Shift+Enter and copy down:

=IF(B2=0,0,IFERROR(ROW()+MATCH(0,B2:INDEX(B:B,COUNTA(B:B)),0),2+COUNTA(B:B))-2-IF(COUNTIF(B$1:B2,0)=0,1,MAX(IF(B$1:B2=0,ROW(B$1:B2)))))

This formula is designed so any line deletions will not cause any ref errors.

Just pointing out that insertions of row(s) will cause incorrect results though.

 

[MarcelBeug]

Just pointing out that insertions of row(s) will cause incorrect results though.

That's true, until the new lines are populated with data (and the formula copied down from the line above the inserted row(s)).

The background of my remark was: it is probably much easier to come up with a formula that is refering to a previous / next row, but that would cause ref errors when rows are deleted.