Hi Ryan

try
=SUMIF(INDEX(F:F,(ROW()-1)*24+1):
INDEX(F:F,(ROW()-1)*24+24),"0")
and copy down
--
Regards
Roger Govier

"thehigh_23" wrote in message
...

Hi Guys

Thanks for your help so far, much appreciated. The formula works a
treat. However the only problem i have is with that formula i would
have to calculate the sum of positive degrees for each day individually
(because I need 365 indvidual positive degree sums) which could take
some time, and i may have to repeat the process for more years later
on.
So with the =SUMIF(F1:F24,"0",F1:F24) formula when i drag the result
down the next box changes to =SUMIF(F2:F25,"0",F2:F25)
Is there a way of telling excel to jump to next set of 24 hours when
you drag the result down e.g the box underneath would contain
=SUMIF(F25:F48,''0'',F25:48) and so on?

Thanks again
Ryan






'Pecoflyer[_353_ Wrote:
;842804']Thx for the reminder Shane

Shane Devenshire;373589 Wrote: -
Hi Pecoflyer,

The third argument of SUMIF is optional, if the 1st and 3rd ranges
are
the
same you can ignore the 3rd argument.

--
If this helps, please click the Yes button.

Cheers,
Shane Devenshire


"Pecoflyer" wrote:
-

Hi,
supposing temp of deg is not included and your data for a given
day-
is-
in cells A1 to A24, follwoing wll give the sum of daily positive-
temps-
:
=sumif(a1:a24,"0",a1:a24)
You ca then multiply this outcome with the meltfactor and area

thehigh_23;373222 Wrote:-
Hi
For a project I am doing university I need to produce a basic
ice--
melt--
model. I have got hourly temperature data for a whole year from
a
certain location and area data from a glacier I am looking at,--
which--
has been broken down to several elevation bands each
containing--
the--
area of ice present in that band.
Basically I need the model first to calculate the sum of postive
degrees for each day of the year (so this would add together
all--
the--
temperature data above 0 for each day). This would leave me
with--
365--
postive degree day factors (DDF).

Each of these DDF's then need to be multiplied by a Meltfactor--
(say--
0.06) and then multiplied by the area of a selceted elevation
band
(DDF x 0.06) x Area

I am still a bit of a novice when it comes to all things excel
so--
Im--
struggling a bit with this one. Its been suggested that I
should--
use--
VBA but to be honest i dont know where to start. Any useful
tips--
etc--
would be much appreciated.

Cheers
Ryan




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