In this post we present an update to our earlier measurement of the Baby Feeding Correlation Function:

The figure above shows a histogram of the interval between feedings for SteelyKid in the 14 weeks since birth. Error bars represent 1-σ statistical uncertainties.

As you can see, we have added a great deal of data since we last posted. The correlation function clearly shows a large peak between 3 and 4 hours, dropping off rapidly to zero for longer feeding times. The zero value for feedings within half an hour clearly demonstrates anti-bunching, indicating that baby feedings are quantized events.

We continue to await the development of *ab initio* theoretical calculations of the distribution with sufficient precision to compare to our data.

(The smattering of points above 7 hours is probably an artifact, either due to data entry errors, or some quirk of the script I used to sort out the data in SigmaPlot. I don’t really care enough to try to figure it out. We’ll just call it “background noise,” and leave it at that.)

(Having figured out how to do the necessary steps in SigmaPlot, the next silly baby data project will be to re-bin the colorful feeding graphs in 23 and 25-hour “days” to see if that causes a clearer pattern to emerge. I’ve spent enough time puttering around with this for today, though.)