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. Author manuscript; available in PMC: 2009 Jan 23.
Published in final edited form as: J Am Stat Assoc. 2006 Dec 1;101(476):1352–1364. doi: 10.1198/016214506000000465

Figure 2. Heat map of all weekday accelerometer profiles.

Figure 2

The rows are the daily profiles, ordered by school and child within school. The columns are the minutes of the day, from 12:01am through 12:00 midnight. The black regions of the plot indicate regions of the profiles where the activity level is missing. Since the minimum activity level is 1 MET, all non-missing activity levels are some shade of gray, not black. The white regions indicate bouts, or regions where the activity profile is > 3.0 MET. The dotted white lines mark the divisions between profiles from different schools.