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diff --git a/R/FOMC.solution.R b/R/FOMC.solution.R deleted file mode 100644 index f5e6a7ea..00000000 --- a/R/FOMC.solution.R +++ /dev/null @@ -1,36 +0,0 @@ -#' First-Order Multi-Compartment kinetics -#' -#' Function describing exponential decline from a defined starting value, with -#' a decreasing rate constant. -#' -#' The form given here differs slightly from the original reference by -#' Gustafson and Holden (1990). The parameter \code{beta} corresponds to 1/beta -#' in the original equation. -#' -#' @param t Time. -#' @param parent.0 Starting value for the response variable at time zero. -#' @param alpha Shape parameter determined by coefficient of variation of rate -#' constant values. -#' @param beta Location parameter. -#' @return The value of the response variable at time \code{t}. -#' @note The solution of the FOMC kinetic model reduces to the -#' \code{\link{SFO.solution}} for large values of \code{alpha} and -#' \code{beta} with \eqn{k = \frac{\beta}{\alpha}}{k = beta/alpha}. -#' @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} -#' -#' Gustafson DI and Holden LR (1990) Nonlinear pesticide dissipation in soil: -#' A new model based on spatial variability. \emph{Environmental Science and -#' Technology} \bold{24}, 1032-1038 -#' @examples -#' -#' plot(function(x) FOMC.solution(x, 100, 10, 2), 0, 2, ylim = c(0, 100)) -#' -#' @export -FOMC.solution <- function(t, parent.0, alpha, beta) -{ - parent = parent.0 / (t/beta + 1)^alpha -} |