derive_prm: Derive full parameter set for mammillary PK model

In xpose.xtras: Extra Functionality for the 'xpose' Package

Derive full parameter set for mammillary PK model

Description

This function applies rxode2::rxDerived to model parameters.

Usage

derive_prm(
  xpdb,
  .prm = NULL,
  .problem,
  quiet = xpdb$options$quiet,
  prefix = ""
)

backfill_derived(
  xpdb,
  .prm = NULL,
  .problem,
  quiet = xpdb$options$quiet,
  ...,
  group_vars = "id"
)

Arguments

xpdb	xpdb <xpose_data> object
.prm	<tidyselect> Parameters to convert (if NULL, the function will use xp_var param types)
.problem	Optional. Problem to use.
quiet	Optional. Extra output.
prefix	If desired, apply prefix to new parameters.
...	Passed to derive_prm()
group_vars	Variable type(s) to join derived parameters on.

Value

<data.frame> of data with new parameters

Examples

if (!rlang::is_installed("rxode2") ||
   !exists("rxDerived", envir = rlang::ns_env("rxode2"))) {

nlmixr2_m3 %>%
  backfill_derived() %>%
  list_vars()

derive_prm(nlmixr2_m3)


# If param has no vars, .prm should be set
pheno_base %>%
  backfill_derived(
    .prm = c(CL,V)
  ) %>%
  list_vars()
}

xpose.xtras documentation built on April 19, 2026, 9:06 a.m.