Calculate the inflation rate between two years

Returns the cumulative or annualised inflation rate between two years, using bundled CPI data sourced from the World Bank Development Indicators.

Usage

inflation_rate(from_year, to_year = NULL, currency, annualise = FALSE)

Arguments

from_year

Integer. The starting year.

to_year

Integer. The ending year. Defaults to the latest available year in the data.

currency

Character. A currency code or country name (case-insensitive). See adjust_inflation for accepted values.

annualise

Logical. If TRUE, returns the annualised (compound annual) rate. If FALSE (default), returns the cumulative rate.

Value

A numeric value representing the inflation rate as a proportion (e.g. 0.35 means 35\

Examples

# Cumulative US inflation from 2000 to 2020
inflation_rate(2000, 2020, "USD")
#> [1] 0.5030813

# Annualised UK inflation from 1990 to 2020
inflation_rate(1990, 2020, "GBP", annualise = TRUE)
#> [1] 0.02298728