NEWS.md

In aion: Archaeological Time Series

aion 1.6.0

New classes and methods

• Add graph_create() to compute an interval or a stratigraphic graph.
• Add graph_prune() to remove redundant relations from a graph.
• Add a format() method for TimeIntervals objects.
• Add names() and names()<- methods for TimeIntervals objects.
• Add precedes(), preceded_by(), meets(), met_by(), overlaps(), overlapped_by(), finishes(), finished_by(), contains(), during() starts(), started_by() and equals() to test for logical relation between time intervals.

aion 1.5.0

Enhancements

• The plot() method for TimeIntervals gained a new groups argument.

Breaking changes

• Remove as_graph().

Internals

• Use an internal package environment instead of options to set the default calendar.

aion 1.4.0

New classes and methods

• Add as_graph() to compute an interval graph.
• Add get_calendar() and set_calendar() to get and set the default calendar.

aion 1.3.0

New classes and methods

• Add calendar_year() to get the average length of the year of a calendar (in solar days).

Enhancements

• Improve French translation.

aion 1.2.0

Enhancements

• Translate into French.

Bugfixes & changes

• Remove year zero ticks in plots (Julian calendar).

Internals

• Epochs of the Gregorian era are no longer represented as subclasses, but as instances of the GregorianCalendar class.

aion 1.1.0

New classes and methods

• Add support for time intervals.

Bugfixes & changes

• Fix a bug in span(): if a calendar was specified, the result was shifted according to the calendar's epoch (dates were returned instead of durations).

aion 1.0.4

• Post publication CRAN release.

aion 1.0.3

• Published in the Journal of Open Source Software.

aion 1.0.2

Bugfixes & changes

• Rename the format argument of format() to prefix.

aion 1.0.1

Bugfixes & changes

• plot() now supports missing values.

aion 1.0.0

• First release.

aion documentation built on Nov. 5, 2025, 6:03 p.m.