Methods to get and set the time periods for a price index.
# S3 method for piar_index
time(x, ...)time(x) <- value
# S3 method for piar_index
time(x) <- value
set_time(x, value)
# S3 method for piar_index
start(x, ...)
# S3 method for piar_index
end(x, ...)
ntime(x)
time() returns a character vector with the time periods for a price index.
start() and end() return the first and last time period.
ntime() returns the number of time periods, analogous to nlevels().
The replacement method returns a copy of x with the time periods in
value. (set_time() is an alias that's easier to use with pipes.)
A price index, as made by, e.g., elemental_index().
Not currently used.
A character vector, or something that can be coerced into one,
giving the replacement time periods for x.
Other index methods:
[.piar_index(),
aggregate.piar_index,
as.data.frame.piar_index(),
as.ts.piar_index(),
chain(),
contrib(),
head.piar_index(),
is.na.piar_index(),
levels.piar_index(),
mean.piar_index,
merge.piar_index(),
split.piar_index(),
stack.piar_index(),
window.piar_index()