jdonnelly333 wrote on Thu, 30 Apr 2009 10:50:38 -0700:

"James Silverton" wrote:

Luke wrote on Thu, 30 Apr 2009 10:11:01 -0700:

Try this:

=(IF(A186,86,A1)+IF(B1<50,50,B1))/2-50
--
Best Regards,

Luke M
*Remember to click "yes" if this post helped you!*

"jdonnelly333" wrote:

All,

I would really love some help. I'm a novice at building
formulas, so I'm looking for some help making a formula
for calculating growing degree days. I've found others on
the web, but none that require base low and limit
high temperatures.

ColumnA is Hi temperatures, ColumnB is low temperatures.

Basic degree day calculations are figured by (A1+B1)/2-50.
What I need different is if A1 is greater than 86, I need
it to be calculated as 86. If B1 is less than 50, I need
it calculated as 50.

Can anyone help?

To the OP: this formula could give negative growing days. What
does that mean? --

Yes, the negative values can be an issue, and leads to my follow-up.
If values are negative, how do you get it to read zero?

There is more than one way to go, including defining a name or writing a
macro, but I think the easiest way would be to put the value calculated
by the given formula in C1 and have D1 equated to =if(c10,c1,0)


--

James Silverton
Potomac, Maryland

Email, with obvious alterations: not.jim.silverton.at.verizon.not