From 12a31f4c130c551f82232d9ef7dfb608bd52c53f Mon Sep 17 00:00:00 2001 From: Johannes Ranke Date: Tue, 27 Sep 2016 23:00:48 +0200 Subject: Reorganise repository using standard package layout --- pkg/R/PEC_sw_sed.R | 50 -------------------------------------------------- 1 file changed, 50 deletions(-) delete mode 100644 pkg/R/PEC_sw_sed.R (limited to 'pkg/R/PEC_sw_sed.R') diff --git a/pkg/R/PEC_sw_sed.R b/pkg/R/PEC_sw_sed.R deleted file mode 100644 index a4a3d6a..0000000 --- a/pkg/R/PEC_sw_sed.R +++ /dev/null @@ -1,50 +0,0 @@ -# Copyright (C) 2015 Johannes Ranke -# Contact: jranke@uni-bremen.de -# This file is part of the R package pfm - -# This program is free software: you can redistribute it and/or modify it under -# the terms of the GNU General Public License as published by the Free Software -# Foundation, either version 3 of the License, or (at your option) any later -# version. - -# This program is distributed in the hope that it will be useful, but WITHOUT -# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS -# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more -# details. - -# You should have received a copy of the GNU General Public License along with -# this program. If not, see - -#' Calculate predicted environmental concentrations in sediment from surface -#' water concentrations -#' -#' The method 'percentage' is equivalent to what is used in the CRD spreadsheet -#' PEC calculator -#' -#' @param PEC_sw Numeric vector or matrix of surface water concentrations in µg/L for -#' which the corresponding sediment concentration is to be estimated -#' @param percentage The percentage in sediment, used for the percentage method -#' @param method The method used for the calculation -#' @param sediment_depth Depth of the sediment layer -#' @param water_depth Depth of the water body in cm -#' @param sediment_density The density of the sediment in L/kg (equivalent to -#' g/cm3) -#' @param PEC_sed_units The units of the estimated sediment PEC value -#' @return The predicted concentration in sediment -#' @export -#' @author Johannes Ranke -#' @examples -#' PEC_sw_sed(PEC_sw_drift(100, distances = 1), percentage = 50) -PEC_sw_sed <- function(PEC_sw, percentage = 100, method = "percentage", - sediment_depth = 5, water_depth = 30, - sediment_density = 1.3, - PEC_sed_units = c("\u00B5g/kg", "mg/kg")) -{ - method = match.arg(method) - PEC_sed_units = match.arg(PEC_sed_units) - if (method == "percentage") { - PEC_sed = PEC_sw * (percentage/100) * (water_depth / sediment_depth) * (1 / sediment_density) - if (PEC_sed_units == "mg/kg") PEC_sed <- PEC_sed / 1000 - } - return(PEC_sed) -} -- cgit v1.2.1