Plot categorical timeseries as alluvial diagram — plot

Uses ggalluvial::geom_flow() and geom_stratum() to show how patients transition between categorical response levels across timepoints. Falls back to bar charts if the alluvial plot fails. Matches applytsoa's report_plot_measure_val_cat() + report_plot_cat_alluvial().

Usage

plot_categorical(
  param_ids,
  df_measures,
  thresh = 0,
  sites = NULL,
  visit_order = NULL
)

Arguments

param_ids: Character vector of one-hot encoded parameter_id values for this categorical field.
df_measures: Data frame as returned by prepare_measures().
thresh: Numeric, score threshold for flagging.
sites: Character vector of site IDs to show. If NULL, auto-selected.
visit_order: Character vector of visit labels in desired x-axis order, or NULL for default (timepoint_rank) ordering.

Value

A ggplot object.