Find a common chronon from a set of chronons

This utility function takes a set of chronons and identifies a common chronon of the finest granularity that can represent all input chronons without loss of information. This is useful for operations that require a shared time unit, such as combining or comparing different time measured at different precisions.

Usage

chronon_common(..., .ptype = NULL)

Arguments

...

A set of chronons to find a common chronon for.

.ptype

If NULL, the default, the output returns the common chronon across all elements of .... Alternatively, a prototype chronon can be supplied to .ptype to demand a specific chronon is used. If the supplied .ptype cannot represent all input chronons without loss of information, an error is raised.

Value

A time unit object representing the common chronon.

Examples

# The common chronon between days and weeks is a day
chronon_common(tu_day(1L), tu_week(1L))
#> <mixtime::tu_day> int 1

# The common chronon between days and months is a day
chronon_common(tu_week(1L), tu_month(1L))
#> <mixtime::tu_day> int 1

# The common chronon between hours, months, and years is an hour
chronon_common(tu_hour(1L), tu_month(1L), tu_year(1L))
#> <mixtime::tu_hour> int 1

# The common chronon between months, quarters, and years is a month
chronon_common(tu_month(1L), tu_quarter(1L), tu_year(1L))
#> <mixtime::tu_month> int 1