Durations

Rather than give a value in seconds, many durations can be expressed using a shorthand notation. For example, in a skin configuration file skin.conf, a value for aggregate_interval can be given as either

aggregate_interval = 3600

or

aggregate_interval = 1h

The same notation can be used in trends. For example:

<p>Barometer trend over the last 2 hours: $trend(time_delta='2h').barometer</p>

Here is a summary of the notation:

Example	Meaning
10800	3 hours
3h	3 hours
1d	1 day
2w	2 weeks
1m	1 month
1y	1 year
hour	Synonym for 1h
day	Synonym for 1d
week	Synonym for 1w
month	Synonym for 1m
year	Synonym for 1y