random_walk_passengers: Simulates a random walk for passengers number

In mgaldino/line4PPPsim: Simulates Fiscal Impact of Subway PPP in Brazil

Description

Auxiliar function. It computes a random walk with jumps, that is used to generate forecasted demand.

Usage

random_walk_passengers(start_seed = 196860, num_years = 33, mu = 0,
  sd = 0.7 * start_seed, beta = 1, jump = T)

Arguments

start_seed	A number. First point of the series.
num_years	A number. Number of years. Usually 33.
mu	A number
sd	A number
beta	A number. Effect of past step on the next step.
jump	Logical. If TRUE, in the eight year of the series the forecasted demand increases by 25 percent relative to last value (plus error). Equivalent to set beta =1.25 for year 8.

Value

a vector of simulated random walk times series of size equal to num_years

Examples

 random_walk_passengers(start_seed=19686)

mgaldino/line4PPPsim documentation built on May 6, 2019, 7:03 p.m.