Get the time periods for a price index

Methods to get and set the time periods for a price index.

Usage

# S3 method for class 'piar_index'
time(x, ...)

time(x) <- value

# S3 method for class 'piar_index'
time(x) <- value

set_time(x, value)

# S3 method for class 'piar_index'
start(x, ...)

# S3 method for class 'piar_index'
end(x, ...)

ntime(x)

Arguments

x

A price index, as made by, e.g., elemental_index().

...

Not currently used.

value

A character vector, or something that can be coerced into one, giving the replacement time periods for x.

Value

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.)

See also

Other index methods: [.piar_index(), aggregate.piar_index, as.data.frame.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()