node_regionplot_longitudinal: Region Plot Panel for Longitudinal GRM Tree Nodes

In grmtree: Recursive Partitioning for Graded Response Models

Region Plot Panel for Longitudinal GRM Tree Nodes

Description

Internal function that generates the terminal node panel function for region plots of longitudinal GRM trees. Extracts only T1 item thresholds (items 1 through n_items) since T2 items have identical constrained parameters.

Usage

node_regionplot_longitudinal(
  mobobj,
  n_items,
  names = FALSE,
  abbreviate = TRUE,
  ylim = NULL,
  off = 0.1,
  col_fun = grDevices::gray.colors,
  bg = "white",
  ylines = 2,
  ...
)

Arguments

mobobj	A longitudinal_grmtree object.
n_items	Number of items per time point.
names	Logical, character vector, or FALSE for labeling.
abbreviate	Logical or numeric for name abbreviation.
ylim	Optional y-axis limits.
off	Offset between items (default: 0.1).
col_fun	Color function for response categories (default: gray.colors).
bg	Background color (default: "white").
ylines	Width of y-axis margin in lines (default: 2).
...	Additional arguments (unused).

Value

A panel function suitable for use with plot.modelparty.

grmtree documentation built on Sept. 2, 2026, 1:07 a.m.