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This visualisation is intended to show what time I slept over a five month period. Each night is represented by a clock face with the shaded area showing what time I was asleep. The reader is able to compare individual days and identify patterns and observe changes in my sleeping routines over time. On the left I show sleep patterns for individual days and then overlay these to slowly build up a picture of my sleep over a longer period of time, first by week, then by month and finally a collection of all the readings I have between October and February.

 
     
Ben Willers 2011   f