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authorJohannes Ranke <jranke@uni-bremen.de>2022-11-25 19:10:28 +0100
committerJohannes Ranke <jranke@uni-bremen.de>2022-11-25 19:10:28 +0100
commit61b9a4046582da5cf88bd3c04d0d6ca77adc3405 (patch)
tree83478bb3fa32ca214d8e6499e8d7ac13d1d15516 /R/mhmkin.R
parentaf7c6de4db9981ac814362c441fbac22c8faa2d7 (diff)
mhmkin: Easy specification of ill-defined parms
The argument 'no_random_effect' now accepts an illparms.mhmkin object
Diffstat (limited to 'R/mhmkin.R')
-rw-r--r--R/mhmkin.R38
1 files changed, 20 insertions, 18 deletions
diff --git a/R/mhmkin.R b/R/mhmkin.R
index 1f29dc40..6a61e8bb 100644
--- a/R/mhmkin.R
+++ b/R/mhmkin.R
@@ -12,13 +12,13 @@
#' degradation models to the same data
#' @param backend The backend to be used for fitting. Currently, only saemix is
#' supported
-#' @param no_random_effect Default is NULL and will be passed to [saem]. If
-#' you specify "auto", random effects are only included if the number
-#' of datasets in which the parameter passed the t-test is at least 'auto_ranef_threshold'.
-#' Beware that while this may make for convenient model reduction or even
-#' numerical stability of the algorithm, it will likely lead to
-#' underparameterised models.
-#' @param auto_ranef_threshold See 'no_random_effect.
+#' @param no_random_effect Default is NULL and will be passed to [saem]. If a
+#' character vector is supplied, it will be passed to all calls to [saem],
+#' regardless if the corresponding parameter is in the model. Alternatively,
+#' an object of class [illparms.mhmkin] can be specified. This has to have
+#' the same dimensions as the return object of the current call. In this way,
+#' ill-defined parameters found in corresponding simpler versions of the
+#' degradation model can be specified.
#' @param algorithm The algorithm to be used for fitting (currently not used)
#' @param \dots Further arguments that will be passed to the nonlinear mixed-effects
#' model fitting function.
@@ -51,7 +51,7 @@ mhmkin.mmkin <- function(objects, ...) {
#' @export
#' @rdname mhmkin
mhmkin.list <- function(objects, backend = "saemix", algorithm = "saem",
- no_random_effect = NULL, auto_ranef_threshold = 3,
+ no_random_effect = NULL,
...,
cores = if (Sys.info()["sysname"] == "Windows") 1 else parallel::detectCores(), cluster = NULL)
{
@@ -102,22 +102,24 @@ mhmkin.list <- function(objects, backend = "saemix", algorithm = "saem",
deg_index <- w[1]
error_index <- w[2]
mmkin_row <- objects[[error_index]][deg_index, ]
- if (identical(no_random_effect, "auto")) {
- ip <- illparms(mmkin_row)
- ipt <- table(unlist(lapply(as.list(ip), strsplit, ", ")))
- no_ranef <- names(ipt)[which((length(ds) - ipt) <= auto_ranef_threshold)]
- transparms <- rownames(mmkin_row[[1]]$start_transformed)
- bparms <- rownames(mmkin_row[[1]]$start)
- names(transparms) <- bparms
- no_ranef_trans <- transparms[no_ranef]
+ if (is(no_random_effect, "illparms.mhmkin")) {
+ if (identical(dim(no_random_effect), dim(fit_indices))) {
+ no_ranef_split <- strsplit(no_random_effect[[fit_index]], ", ")
+ no_ranef <- sapply(no_ranef_split, function(x) {
+ gsub("sd\\((.*)\\)", "\\1", x)
+ })
+ } else {
+ stop("Dimensions of illparms.mhmkin object given as 'no_random_effect' are not suitable")
+ }
} else {
- no_ranef_trans <- no_random_effect
+ no_ranef <- no_random_effect
}
res <- try(do.call(backend_function,
- args = c(list(mmkin_row), dot_args, list(no_random_effect = no_ranef_trans))))
+ args = c(list(mmkin_row), dot_args, list(no_random_effect = no_ranef))))
return(res)
}
+
fit_time <- system.time({
if (is.null(cluster)) {
results <- parallel::mclapply(as.list(1:n.fits), fit_function,

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