Essentially, what I am trying to do is make custom groupings of dates (2 month groupings, for example) in order to use these date groupings as either a filter or on the Pages Shelf. So, for example, I could look at the correlation of two numbers during the first two month grouping compared to the second two month grouping.
Date Groupings (2 months at a time)
1/31/2010 - 2/28/2010
2/28/2010 - 3/31/2010
3/31/2010 - 4/30/2010
4/30/2010 - 5/31/2010
If you can give me any help, it would greatly be appreciated.