Convert a datey to calendar years (including fractional part)

Converts a datey to calendar years, including a fractional part that represents the proportion of the calendar year that has elapsed.

For example,

the start of 2000-01-01 (or, equivalently, the end of 1999-12-31), results in 2000, and
the middle of the calendar year 2000 results in 2000.5.

Note the following:

as.numeric() is the same as as.double().
as.integer() gives the calendar year, e.g. as.integer(datey(2000.9)) is 2000. as.integer(x) is the same as as.integer(as.double(x)).

Usage

# S3 method for class 'datey'
as.double(x, ...)

# S3 method for class 'datey'
as.integer(x, ...)

A vector of double.