Nothing
### ============================================================================
### dopri853-- Dormand-Prince runge-kutta of order 8(5,3)
### ============================================================================
dopri853 <- function(y, times, func, parms, rtol=1e-6, atol=1e-6,
verbose=FALSE, hmax = NULL, hini = hmax, ynames=TRUE, maxsteps=10000,
dllname=NULL, initfunc=dllname, initpar=parms,
rpar=NULL, ipar=NULL, nout=0, outnames=NULL, forcings=NULL,
initforc = NULL, fcontrol=NULL, ...)
{
if (is.list(func)) { # a list of compiled codes
if (!is.null(initfunc) & "initfunc" %in% names(func))
stop("If 'func' is a list that contains initfunc, argument 'initfunc' should be NULL")
if (!is.null(dllname) & "dllname" %in% names(func))
stop("If 'func' is a list that contains dllname, argument 'dllname' should be NULL")
if (!is.null(initforc) & "initforc" %in% names(func))
stop("If 'func' is a list that contains initforc, argument 'initforc' should be NULL")
if (!is.null(func$initfunc)) initfunc <- func$initfunc
if (!is.null(func$dllname)) dllname <- func$dllname
if (!is.null(func$initforc)) initforc <- func$initforc
func <- func$func
}
### check input
hmax <- checkInput (y, times, func, rtol, atol,
NULL, NULL, 0, hmax, hini, dllname)
n <- length(y)
if (is.null(hini)) hini <- 0
if (hini <= 0) hini <- 0
### atol and rtol have to be of same length here...
if (length(rtol) != length(atol)) {
if (length(rtol) > length(atol))
atol <- rep(atol, length.out=n)
else
rtol <- rep(rtol, length.out=n)
}
### model function
Ynames <- attr(y,"names")
flist <- list(fmat=0,tmat=0,imat=0,ModelForc=NULL)
ModelInit <- NULL
if (is.character(func) | inherits(func, "CFunc")) { # function specified in a DLL
DLL <- checkDLL(func,NULL,dllname,
initfunc,verbose,nout, outnames)
ModelInit <- DLL$ModelInit
Func <- DLL$Func
Nglobal <- DLL$Nglobal
Nmtot <- DLL$Nmtot
if (! is.null(forcings))
flist <- checkforcings(forcings,times,dllname,initforc,verbose,fcontrol)
rho <- NULL
if (is.null(ipar)) ipar<-0
if (is.null(rpar)) rpar<-0
} else {
if (is.null(initfunc))
initpar <- NULL # parameter initialisation not needed if function is not a DLL
rho <- environment(func)
# func overruled, either including ynames, or not
# This allows to pass the "..." arguments and the parameters
if (ynames) {
Func <- function(time,state) {
attr(state,"names") <- Ynames
unlist(func (time,state,parms,...))
}
Func2 <- function(time,state) {
attr(state,"names") <- Ynames
func (time,state,parms,...)
}
} else { # no ynames...
Func <- function(time,state)
unlist(func (time,state,parms,...))
Func2 <- function(time,state)
func (time,state,parms,...)
}
## Check function and return the number of output variables +name
FF <- checkFunc(Func2,times,y,rho)
Nglobal<-FF$Nglobal
Nmtot <- FF$Nmtot
}
### work arrays iwork, rwork
# length of rwork and iwork
lrw <- 11 * n + 8 * n + 21
liw <- 21 + n
# only first 20 elements passed; other will be allocated in C-code
iwork <- vector("integer",20)
rwork <- vector("double",20)
rwork[] <- 0.
iwork[] <- 0
iwork[1] <- maxsteps
iwork[2] <- 1
iwork[3] <- 1
iwork[4] <- 0 # stifness test toggled on
iwork[5] <- n
rwork[1] <- .Machine$double.neg.eps
rwork[2] <- 0.9 # safety factor error reductin
rwork[6] <- hmax
rwork[7] <- hini ## will be 0 in c-code
if(is.null(times)) times<-c(0,1e8)
### print to screen...
if (verbose) {
printtask(0,func,NULL)
printM("\n--------------------")
printM("Integration method")
printM("--------------------")
printM( "Dopri853")
}
### calling solver
storage.mode(y) <- storage.mode(times) <- "double"
tcrit <- NULL
out <- .Call("call_dop",y,times,Func,initpar,
rtol, atol, rho, ModelInit,
as.integer(verbose), as.double(rwork),
as.integer(iwork), as.integer(Nglobal),
as.integer(lrw),as.integer(liw),
as.double (rpar), as.integer(ipar),
flist, as.integer(1), PACKAGE="deTestSet")
### saving results
out <- saveOut(out, y, n, Nglobal, Nmtot, func, Func2,
iin= 1:5, iout=c(1,3,2,13,13))
if (Nglobal > 0) attributes(out)$istate[3] <- attributes(out)$istate[3] + nrow(out)
attr(out, "type") <- "dopri853"
if (verbose) diagnostics(out)
return(out)
}
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