Create a trend specification for model parameters

Usage

make_trend(
  par_names,
  cov_names,
  kernels,
  bases = NULL,
  shared = NULL,
  trend_pnames = NULL,
  premap = TRUE,
  pretransform = FALSE
)

Arguments

par_names: Character vector specifying which parameters to apply trend to
cov_names: Character vector specifying which covariates to use for each trend
kernels: Character vector specifying which kernel function to use for each trend
bases: Optional character vector specifying which base function to use for each trend
shared: Named list with entries the parameter names to be shared and the names the new names of the shared parameter.
trend_pnames: Optional character vector specifying custom parameter names
premap: Logical indicating if trend should be applied before or after parameter mapping
pretransform: If !premap, logical indicating if trend should be applied before or after parameter transformation

Value

A list containing the trend specifications for each parameter

Examples

# Put trend on B and v parameters
trend <- make_trend(
  par_names = c("B", "v"),
  cov_names = "strial",
  kernels = c("exp_incr", "poly3"),
  premap = TRUE,
  shared = list(shrd = list("B.B0", "v.d1"))
)
get_trend_pnames(trend)
#> [1] "shrd"   "B.d_ei" "v.d2"   "v.d3"