Weekends make me fat!

I've been trying to shift some weight recently and having some success thanks to a great Android app called 'WWDiary' published by CanOfSleep.

Weekends are never a good time for losing weight, but that's just a hunch. It just occurred to me today I may have enough data to actually prove this.

One of the features of this app is a weight diary which I've been using. So I plugged the data into a data file and ran it through GnuPlot.

I then did an auto correlation of this curve:

And sure enough there is a definite peak at 7, 14 and 21 days. "Proof" that weekends do indeed make me fat! [Will revisit this when I have more data!]

Update (28 May 2014): This post was first posted 31 Aug 2012. After almost two more years of data I thought I should update the auto correlation chart:

The peaks at about 7, 14 and 21 days is getting more pronounced.