Editing Code Guide (section)

===Tracking Time===
Keeping track of the sample times was very important for this
project. As the samples are recorded by AEMO in discrete five
minute (or thirty minute) intervals, we chose to simply use a reference
point and data indices to track the passage of time. This
allowed us to save significant memory space as storing time data
separately would have meant two values per data point rather
than just one. We chose a reference time of 1st January 2015
at 00:00:00 (the start of the new year). This means that midday
on January 1st 2015 has an index of 144. The functions Sample-
ToDatetime and DatetimeToSample perform the conversion between
sample index and time strings.