Shift Layer Class — ShiftLayer • pharmhand

Layer for shift table analysis showing transitions from baseline to post-baseline states (e.g., lab grade shifts).

Usage

ShiftLayer(
  target_var = character(0),
  by_vars = character(0),
  where = NULL,
  format_spec = NULL,
  label = NULL,
  metadata = list(),
  distinct_by = "USUBJID",
  include_n = TRUE,
  include_pct = TRUE
)

Arguments

target_var: Character vector of exactly 2 variable names: c(baseline_var, post_var). First element is the baseline variable, second is the post-baseline variable.
by_vars: Character vector of grouping variables
where: Filter expression (quosure or NULL)
format_spec: Format specification for output
label: Optional label for the layer
metadata: Additional metadata
distinct_by: Variable for distinct counting (default: USUBJID)
include_n: Logical, include subject counts
include_pct: Logical, include percentages

Value

A ShiftLayer object

Examples

if (FALSE) { # \dontrun{
layer <- ShiftLayer(
  target_var = c("BTOXGR", "ATOXGR"),
  by_vars = "TRT01P"
)
} # }