Automating averaging a column over time periods.

Giganews Newsgroups
Subject: Automating averaging a column over time periods.
Posted by:  A S-D (
Date: Thu, 18 May 2006

I have another pretty difficult problem, and unfortunately my workbook
is 5mb (!) big so I can't upload it for clarity. I can upload a small
portion if anyone needs it.

Basically: I have a column with a timestamp starting from 1300 hours on
day 1 until 0800 hours 187 hours later (8 days later). From this I
calculated a running total (or cumulative total) of time from 1300 on
day 1. Now, for every hour of cumulative time I want to average the
values of that hour for some attached columns. This isn't too difficult
to do by hand, but is there an automated way to do it?

A couple of problems:

1 - the number of points in each hour varies - some may have 2 data
points to be averaged, others may have hundreds.

2 - Sometimes there are data points that stretch over the boundary of
an hour i.e. a data point that lasts for half an hour will go over an
hour boundary by 15 minutes (for example). I then have to split this
data point up into two, with 15 minutes both before and after the hour
boundary. This is incredibly time consuming.

I have no idea how to automate this, and I've been stuck on it for
quite a long time. I will attach a sample of my spread sheet. Please
ask if you have questions.

I've had this problem for a while now and I can't figure out anything.
If anyone here can help me I would be very grateful. I've lost all

Thank you very much for any help you can give.

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