Is a sleep pattern meant to look like this?

[fivemack]

The oscillations of period 2 around the really smooth moving average look like an inadequately damped feedback system; I wonder what sort of thing would work as a damper?

Comments

[aardvark179.livejournal.com]

Are the gaps in the data due to not keeping records of way too much coffee?

I'm not sure if it's normal, but I have a habit of not sleeping a huge amount during the week and often much more at weekends, or at least dozing more at weekends.

I'm not sure how much this is due to a need to sleep, or my disinclination to get out of bed, bit of both I'd guess.