% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/HS.solution.R
\name{HS.solution}
\alias{HS.solution}
\title{Hockey-Stick kinetics}
\usage{
HS.solution(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}.
}
\description{
Function describing two exponential decline functions with a break point
between them.
}
\examples{

  plot(function(x) HS.solution(x, 100, 2, 0.3, 0.5), 0, 2, ylim=c(0,100))

}
\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://esdac.jrc.ec.europa.eu/projects/degradation-kinetics}
}