Initial import of the kinfit package developed from 2008-07 to 2010-03 at

Harlan Laboratories Ltd (former RCC Ltd).

Supports fitting of parent data with the usual FOCUS kinetic models.



git-svn-id: svn+ssh://svn.r-forge.r-project.org/svnroot/kinfit/pkg/kinfit@2 edb9625f-4e0d-4859-8d74-9fd3b1da38cb

1 files changed, 35 insertions, 0 deletions

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+\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 }