1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
\name{HS}
\Rdversion{1.1}
\alias{HS}
\title{ Hockey-Stick kinetics }
\description{
Function describing two exponential decline functions with a break point
between them.
}
\usage{
HS(t, parent.0, k1, k2, tb)
}
\arguments{
\item{t}{ Time. }
\item{parent.0}{ Starting value for the response variable at time zero. }
\item{k1}{ First kinetic constant. }
\item{k2}{ Second kinetic constant. }
\item{tb}{ Break point. Before this time, exponential decline according
to \code{k1} is calculated, after this time, exponential decline proceeds
according to \code{k2}. }
}
\value{
The value of the response variable at time \code{t}.
}
\references{
FOCUS (2006) \dQuote{Guidance Document on Estimating Persistence and
Degradation Kinetics from Environmental Fate Studies on Pesticides in EU
Registration} Report of the FOCUS Work Group on Degradation Kinetics,
EC Document Reference Sanco/10058/2005 version 2.0, 434 pp,
\url{http://focus.jrc.ec.europa.eu/dk}
}
\author{ Johannes Ranke }
\examples{
\dontrun{plot(function(x) HS(x, 100, 2, 0.3, 0.5), 0, 2, ylim=c(0,100))}
}
\keyword{ manip }
|
