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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/>.
#
input.scaling <- function(parms=NULL,
derparms=NULL,
codescale=NULL,
ic=NULL,
check=FALSE){
# Input validation
if (check){
if (is.null(codescale))
stop('codescale argument is NULL.')
if (!is.character(codescale))
stop('codescale argument must be an object of class \'character\'')
if (length(codescale)>1)
stop('codescale argument must have a length of 1.')
}
# Evaluation of codescale
if (is.null(derparms)){
cparms <- as.list(parms)
} else {
cparms <- c(parms,derparms)
}
scale <- with(cparms,{
eval(parse(text=codescale))
return(scale)
})
# Check scale object
if (check){
if (is.null(scale))
stop('scale object created in the $SCALE block cannot be NULL.')
if (size(scale,1)!=1)
stop('scale must be a scalar or a vector.')
}
# Expand scale if it is a scalar
if (size(scale,2)==1){
scale <- rep(scale,size(ic,2))
} else {
if (check){
if (size(scale,2)!=size(ic,2))
stop(paste('scale must be a scalar or have the same',
'dimension as the system of\n differential equations.'))
}
}
return(scale)
}
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