discount: Discount a Quantity Over Time. Should be a scalar if time is...

In heemod: Markov Models for Health Economic Evaluations

Discount a Quantity Over Time. Should be a scalar if time is specified, a vector otherwise

Description

Discount a Quantity Over Time. Should be a scalar if time is specified, a vector otherwise

Usage

discount(x, r, first = FALSE, period = 1, linear = FALSE, time)

Arguments

x	numeric. A quantity to discount.
r	discount rate.
first	logical. Should discounting start at the first value?
period	Number of cycle per unit of discount rate.
linear	logical. Should the discount rate vary linearly along the whole period?
time	The cycle number.

Details

If the unit of discount rate is the year and a cycle duration is 1 month, period should be 12.

Value

A numeric vector of the same length as x.

Examples

discount(rep(10, 5), .02)
discount(rep(10, 5), .02, first = FALSE)
 
discount(1000, .05, time = 10)
discount(1000, .05, period = 2, time = 1:10)
discount(1000, .05, period = 2, time = 1:10, linear = TRUE)

heemod documentation built on June 16, 2025, 5:08 p.m.