[O] Data format for keeping track of weekly & yearly stats?

[Leo Ufimtsev]

Hello, 

I'm new to Tables/formulas.

I started using a table with formulas to keep track of productivity, # of hours 
of sleep etc.. 

I have something like this:
        | Day              |  Dev |  Leo |        @ 9 | Sleep |
        |------------------+------+------+------------+-------|
        | [2015-03-04 Wed] | 3:01 | 3:55 |          1 |  8:00 |
        | [2015-03-05 Thu] | 4:00 | 0:52 |          0 |  7:39 |
        | [2015-03-06 Fri] | 4:03 | 0:00 |         .5 |  8:00 |
        | [2015-03-09 Mon] | 5:09 | 0:00 |          0 |  8:15 |
        | [2015-03-10 Tue] | 3:14 | 1:12 |         .5 |  7:25 |
        | [2015-03-11 Wed] | 4:55 | 0:53 |         .5 |  7:30 |
        | [2015-03-12 Thu] |      |      |          0 |  7:24 |
        | [2015-03-13 Fri] |      |      |            |       |
        |------------------+------+------+------------+-------|
        | March            |  3.0 |  3.9 | 0.42857143 |   7.8 |
        #+TBLFM: 
@>$4=vmean(@address@hidden)::@>$5=vmean(@address@hidden);t%.1f::@>$2=vmean(@I$2);t%.1f::@>$3=vmean(@I$3);t%.1f

At the bottom I have averages for each column. (in the future I'd like to make 
a correlation analysis between sleep and productivity).

Now, I would like weekly *and* yearly totals. I can't seem to come up with a 
solution that wouldn't involve a lot of hard-coding or insertion of formulas by 
hand.

Any ideas? Do you think org-collector with two collector tables might be a 
better solution for this sort of requirement?

Thank you

Leo Ufimtsev | Intern Software Engineer @ Eclipse Team