Excel base 10 log for Optical Density vs %T

[BillO]

Hi I have two possible data columns in a spreadsheet, I can enter the OD or %T
I would then like to calculate the average, max, and min of either column
after the data set is filled in. The formulat to convert %T to OD
=(10^-C19)*100 what I am having trouble with is setting up a single cell to
calculate either the %T column or OD column depending on which has data in it
and not counting blank cells as 0 or 100.

%T OD
10.00 1.00


I hope some one can respond with an easy solution.

Thanks

 

[Barb Reinhardt]

Check your other postings ... and be patient.