ef_fun {vein} | R Documentation |
Experimental: Returns a function of Emission Factor by age of use
Description
ef_fun
returns amount of vehicles at each age
Usage
ef_fun(
ef,
type = "logistic",
x = 1:length(ef),
x0 = mean(ef),
k = 1/4,
L = max(ef),
verbose = TRUE
)
Arguments
ef |
Numeric; numeric vector of emission factors. |
type |
Character; "logistic" by default so far. |
x |
Numeric; vector for ages of use. |
x0 |
Numeric; the x-value of the sigmoid's midpoint, |
k |
Numeric; the steepness of the curve. |
L |
Integer; the curve's maximum value. |
verbose |
Logical; to show the equation. |
Value
numeric vector.
References
https://en.wikipedia.org/wiki/Logistic_function
Examples
## Not run:
CO <- ef_cetesb(p = "CO", veh = "PC_G")
ef_logit <- ef_fun(ef = CO, x0 = 27, k = 0.4, L = max(CO))
df <- data.frame(CO, ef_logit)
colplot(df)
## End(Not run)
[Package vein version 1.1.3 Index]