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Rebase Time Series Data Relative to a Base Period

Source: R/time_series.R
rebase.Rd

Calculates a rebased time series using a given date range as the base period. The base period average is set to 100, and all other values are scaled accordingly.

Usage

rebase(x, start, end, ...)

# S3 method for class 'ts'
rebase(x, start, end, ...)

# S3 method for class 'list'
rebase(x, start, end, ...)

# S3 method for class 'mts'
rebase(x, start, end, ...)

Arguments

x

An ets object.

start

the time of the first observation. Either a single number or a vector of two numbers (the second of which is an integer), which specify a natural time unit and a (1-based) number of samples into the time unit. See the examples for the use of the second form.

end

the time of the last observation, specified in the same way as start.

...

arguments passed to methods (unused for the default method).

Value

An ets object with the level computed.

Examples

x <- as_ets(ts(c(90, 95, 100, 105), start = c(2020, 1), frequency = 4))
rebase(x, start = c(2020, 2), end = c(2020, 3))
#>           Qtr1      Qtr2      Qtr3      Qtr4
#> 2020  92.30769  97.43590 102.56410 107.69231