price_relative {piar} | R Documentation |
Calculate period-over-period price relatives
Description
Construct period-over-period price relatives from information on prices and products over time.
Usage
price_relative(x, ...)
## Default S3 method:
price_relative(x, ..., period, product)
## S3 method for class 'data.frame'
price_relative(x, formula, ...)
Arguments
x |
Either a numeric vector (or something that can be coerced into one) or data frame of prices. |
... |
Further arguments passed to or used by methods. |
period |
A factor, or something that can be coerced into one, that
gives the corresponding time period for each element in |
product |
A factor, or something that can be coerced into one, that
gives the corresponding product identifier for each element in |
formula |
A two-sided formula with prices on the left-hand side, and time periods and products (in that order) on the right-hand side. |
Value
A numeric vector of price relatives, with product
as names.
See Also
gpindex::back_period()
to get only the back price.
gpindex::base_period()
for making fixed-base price relatives.
carry_forward()
and shadow_price()
to impute missing prices.
gpindex::outliers
for methods to identify outliers with price relatives.
Examples
price_relative(
1:6,
period = rep(1:2, each = 3),
product = rep(letters[1:3], 2)
)