Calculating average timings (with a slight twist)

Shadowboxer

Board Regular
Joined
Aug 24, 2006
Messages
60
I wish to calculate the averages timings (of a vehicle to pass between two points) across a number of columns but to be able to deselect some entries at an unspecified future date and have the average column ignore deleted entries and calculate the average only from entries containing a time.

I don't know how to do this.

Here's an example of my layout:

Columns AI to AR will contain timings in the format hh:mm:ss (the timings of a vehicle travelling between 2 points)

Column AS will show the average of all those timings taken - but must be able do so whilst ignoring nil entries (e.g. 00:00:00).

If anybody could explain how I can do this I would be most grateful.
 

Excel Facts

Copy formula down without changing references
If you have =SUM(F2:F49) in F50; type Alt+' in F51 to copy =SUM(F2:F49) to F51, leaving the formula in edit mode. Change SUM to COUNT.

GlennUK

Well-known Member
Joined
Jul 8, 2002
Messages
11,722
An array formula ( entered using Ctrl-Shift-Enter ) of :
Code:
=AVERAGE(IF(AI2:AR2>0,AI2:AR2))

or, do:
Code:
SUM(AI2:AR2)/COUNTIF(AI2:AR2,">0")
 

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