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jimrandomh comments on Modeling sleep patterns - Less Wrong
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What information are you hoping to get out of this? "I just slept for 7 hours, I can expect to be awake for X hours with probability pX"? Or "my sleep patterns repeat this 125 hour cycle"?
If you have the data in a convenient format, I could take a look at it more easily than I could explain how to take a look at it.
More like, "here's the times I went to sleep and woke up in the previous month. What can I expect today?" Hopefully including the effects of caffeine, delayed sleep, early awakening, etc. My sleep may sort of follow a cycle, but it's not regular enough that knowing the cycle would be that useful.
Here's the raw data for 6 months or so last year: Data.
EDIT: I was unemployed during this period, and not using an alarm regularly, so I was sleeping exactly when I felt like it. If I was working it would look much different.
Now we're getting somewhere! One thing really jumps out at me in that log:
I see no mention in the log of it having been replaced. That is a big deal. It may not be the entire cause of your sleep problem, but it is at least a very major contributing factor. You need to replace that mattress immediately, or find somewhere else to sleep.
It was replaced shortly after, and my back problems promptly dissipated. I had only been sleeping on that mattress for a few weeks at the time, having just thrown away another.
Side note: I thought my mattress was giving me lots of back problems (and incidentally sleep problems), and replaced it, and everything was fixed. Some months later I resumed sleeping with a certain very comfortable, too-small blanket. I hadn't realized I had stopped when I switched mattresses. The back problems returned. I got rid of the blanket, they went away. The too-small blanket had caused me to curl up into too tight a ball while sleeping.