Name: Average Pace Over Period
Rating: 4.8 (5 reviews)
Author: torsteinvh

This data field continuously calculates the average pace over the last two minutes. Pace is shown in min/km or min/miles, depending on user settings.
Based on a request in the Connect IQ App Ideas forum: https://forums.garmin.com/showthread.php?222060-Last-2min-500m-Averaged-Pace
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Added filter to only use data from when timer is running. This is to prevent stopping at red lights and so on from interfering with the average pace. 
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This version is limited to the average over a 2 minute period. When user-specified properties are made available, I will release an updated version where the user can specify the period. In the support thread below there are links to 1 minute and 30 second versions of the data field for sideloading.
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Support thread: https://forums.garmin.com/showthread.php?228301-Datafield-Average-Pace-Over-Period&p=554352
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Development history:
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Version 0.7 - March 26, 2015: 
- Tweaked the pace averaging filter.
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Version 0.6 - March 23, 2015: 
- Removed leading zero from minute field.
- Fixed leading zero bug in seconds field.
- Added experimental filter to only use data from when timer is running.
- Flipped the icon.
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Version 0.5 - March 16, 2015: 
- Initial version.