Problem with that is that it averages blanks as well. I also noticed that
the last date is inverted in comparison to the others. Both can be overcome
with

=AVERAGE(IF(B1:B34-A1:A34<>0,ABS(B1:B34-A1:A34)))

which is still an array form ula.

--
HTH

Bob Phillips

"R.VENKATARAMAN" <vram26@vsnl$$$.net> wrote in message
news:OGk7flkdFHA.584@TK2MSFTNGP15.phx.gbl...
>
>
> your data is A! to A14 abd B1 to B14
>
>
> try this in any cell
>
> =AVERAGE(A1:A14-B1:B14)
> this is array formula . so DONT hit enter but hit control+shift+enter
> I have used numbers instead of dates. I expect this to work even with
dates
> provided cells are in date foramt.
>
>
>
> Krishna Mohan <KrishnaMohan@discussions.microsoft.com> wrote in message
> news:511F2E1C-D1FC-465A-800E-83EDD502039C@microsoft.com...
> > Hi,
> > I have a situation like this below..
> > 18-Feb-02 02-Jun-04
> > 26-Jul-02 08-Jun-04
> > 29-Jul-03 10-Jun-04
> > 22-Oct-03 05-Jun-04
> > 01-Nov-03 10-Jun-04
> > 11-Nov-03 14-Jun-04
> > 18-Nov-03 04-Jun-04
> > 20-Dec-03 21-May-04
> > 30-Mar-04 10-Jun-04
> > 08-May-04 22-Jun-04
> > 29-May-04 15-Aug-04
> >
> >
> > 11-Jun-04 11-Jul-04
> > 12-Jun-04 16-Jun-04
> > 22-Jun-04 28-Jun-04
> > 24-Jun-04 26-Jun-04
> >
> > 10-Dec-04 23-Dec-04
> >
> >
> >
> > 28-Aug-04 01-Sep-04
> > 28-Sep-04 29-Sep-04
> > 08-Dec-04 22-Dec-04
> >
> > 20-Aug-04 29-Aug-04
> >
> > 25-Aug-04 31-Aug-04
> > 30-Aug-04 10-Sep-04
> > 03-Jan-05 10-Jan-05
> > 27-Sep-04 05-Oct-04
> > 30-Sep-04 07-Oct-04
> > 03-Oct-04 04-Oct-04
> >
> > The above are two columns of excel. I want to calculate the average of
the
> > difference for each month in another work sheet like bwlow
> >
> > Month Difference..
> >
> > Can some one help me on how I can do that
>
>