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Geomean producing unexplained #NUM!
I'm getting the #NUM! error when I try to calculate the Geometric Mean of a column of values. I've confirmed there's no values <= 0 and cleared blanks, but it doesn't help. I can successfully calculate Geomean up to a certain row ( e.g. A2:A2062), but as soon as I expend past that row (e.g. A2:A2065), I get the num error. I have three columns of data that I am calculating the geomean of and this error occurs for two of them. In the two "bad" columns, he error is triggered at different cells(Cell A2063 and Cell C2076 in the other). The third column works fine and will allow me to extend the range past the end of the data without giving an error.
I can't see any issues with the values in the cells and have tried changing their format from "general' to "number" and also tried to delete the values and retype them in.
Any suggestions greatly appreciated.
Regards,
Paul
(Edited with a simpler demonstration)
It does not take much to demonstrate a situation where GEOMEAN of 2060+ data points returns #NUM.
Select A2:A2067, type 1.41, then press ctrl+Enter (not ctrl+shift+Enter) to enter 1.41 into all cells.
Note that =GEOMEAN(A2:A2066) returns 1.41. But =GEOMEAN(A2:A2067) returns #NUM.
The reason is =PRODUCT(A2:A2066) returns 1.372E+308 (rounded).
But =PRODUCT(A2:A2067) returns #NUM because 1.41*1.372E+308 would be 1.935E+308 (rounded), which exceeds the limit of 64-bit binary floating-point of less than 1.80E+308.
A work-around is:
=10^AVERAGE(LOG(A2:A2067))
If the range might have non-numeric data or empty cells:
=10^AVERAGE(IF(ISNUMBER(A2:A3000),LOG(A2:A3000)))
The latter formula must be array-entered in some versions of Excel.
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If that does not solve your problem, you should be able to attach an example Excel file by clicking "browse" at the bottom of the Reply window.
Alternatively, upload an example Excel file that demonstrates the problem to a file-sharing website, and post a download URL that does not require that we log in.
I like box.net/files; others like dropbox.com. You might like onedrive.live.com because it uses the same login as this forum.If you cannot post the actual URL, edit the beginning of it so that it does not look like a bona fide URL. For example, the URLfor this thread is
techcommunity dot microsoft dot com /t5/excel/geomean-producing-unexplained-num/m-p/3739059#M180397 .
PS.... But if you ``can't create a link due to organisation restrictions``, I would imagine you cannot click "browse", either. The only other option might be to email the example Excel file. But your org might restrict even those attachments. (sigh)
You first step should be to consult the help article on the function and not asking a question on a forum.
if any data point ≤ 0, GEOMEAN returns the #NUM! error value.
Hi Detlef, thank you for this advice. However, I did read the help article and that was the first thing that I checked. NONE of the input values were <= 0! If you check my post, you will see that I actually said this in my explanation. For the record, the values vary between 0.02 and 39.64.
So, if you have a more useful solution, I'd be glad to hear it.
