vkm: Estimation of VKM

In vein: Vehicular Emissions Inventories

Estimation of VKM

Description

vkm consists in the product of the number of vehicles and the distance driven by these vehicles in km. This function reads hourly vehicles and then extrapolates the vehicles

Usage

vkm(
  veh,
  lkm,
  profile,
  hour = nrow(profile),
  day = ncol(profile),
  array = TRUE,
  as_df = TRUE
)

Arguments

veh	Numeric vector with number of vehicles per street
lkm	Length of each link (km)
profile	Numerical or dataframe with nrows equal to 24 and ncol 7 day of the week
hour	Number of considered hours in estimation
day	Number of considered days in estimation
array	When FALSE produces a dataframe of the estimation. When TRUE expects a profile as a dataframe producing an array with dimensions (streets x hours x days)
as_df	Logical; when TRUE transform returning array in data.frame (streets x hour*days)

Value

emission estimation of vkm

Examples

## Not run: 
# Do not run
pc <- lkm <- abs(rnorm(10,1,1))*100
pro <- matrix(abs(rnorm(24*7,0.5,1)), ncol=7, nrow=24)
vkms  <- vkm(veh = pc, lkm = lkm, profile = pro)
class(vkms)
dim(vkms)
vkms2  <- vkm(veh = pc, lkm = lkm, profile = pro, as_df = FALSE)
class(vkms2)
dim(vkms2)

## End(Not run)

vein documentation built on May 29, 2024, 7:20 a.m.