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#Copyright (c) 2009-2022 Sebastien Bihorel
#All rights reserved.
#
#This file is part of scaRabee.
#
# scaRabee 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.
#
# scaRabee 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 scaRabee. If not, see <http://www.gnu.org/licenses/>.
#
derived.parms <- function(parms=NULL,
covdata=NULL,
codederiv=NULL,
check=FALSE){
# Input validation
if (check){
if (is.null(parms))
stop('parms argument (primary parameters) is NULL.')
if (is.null(codederiv))
stop('codederiv argument (derived parameters) is NULL.')
if (!is.character(codederiv))
stop('codederiv argument must be an object of class \'character\'')
if (length(codederiv)>1)
stop('codederiv argument must have a length of 1.')
}
# Prevent modification of parameters and covariates
redef.parms <- any(unlist(sapply(
names(parms),
function(x,codederiv) {grep(paste(x,"[[:space:]]*[=<]",sep=""),codederiv)},
codederiv)))
redef.covdata <- any(unlist(sapply(
names(covdata),
function(x,codederiv) {grep(paste(x,"[[:space:]]*[=<]",sep=""),codederiv)},
codederiv)))
if (redef.parms)
stop('Parameters cannot be modified in $DERIVED.')
if (redef.covdata)
stop('Covariates cannot be modified in $DERIVED.')
# Evaluation of codederiv
if (is.null(covdata)){
cparms <- as.list(parms)
} else {
cparms <- c(parms,covdata)
}
objects.new <- with(cparms,{
# Get all objects available before evaluation
objects.start <- ls(all=TRUE)
# Evaluation
eval(parse(text=codederiv))
# Get all objects created by evaluation
objects.end <- ls(all=TRUE)
objects.end <- objects.end[-which(objects.end=='objects.start')]
objects.new <- lapply(objects.end[!objects.end%in%objects.start],
function(x) eval(parse(text=x)))
names(objects.new) <- objects.end[!objects.end%in%objects.start]
return(objects.new)
})
return(objects.new)
}
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