On: Hedonometer

[naraga]

but really, what about this sine wave? is this some kind of an error in data?

[Anon84 → naraga]

Looks like a typical seasonality curve. Things tend to repeat at the same period of the year (say, happy in summer, sad in winter). You can see similar patterns at different time scales (weekend vs week, day vs night etc)

[naraga → Anon84]

but there is this huge ~4 yr cycle