The tab_info() function

Let’s use a portion of the gtcars dataset to create a gt table. We’ll use tab_spanner() to group two columns together under a spanner column with the ID and label "performance". Finally, we can usetab_info() in a separate, interactive statement so that we can inspect a table that summarizes the ID values any associated label text for all parts of the table.

gt_tbl <-
  gtcars |>
  dplyr::select(model, year, starts_with("hp"), msrp) |>
  dplyr::slice(1:4) |>
  gt(rowname_col = "model") |>
  tab_spanner(
    label = "performance",
    columns = starts_with("hp")
  )

gt_tbl |> tab_info()

Information on ID and Label Values
ID	Idx Lvl	Label
Columns
model	1	model
year	2	year
hp	3	hp
hp_rpm	4	hp_rpm
msrp	5	msrp
Rows
GT	1	GT
458 Speciale	2	458 Speciale
458 Spider	3	458 Spider
458 Italia	4	458 Italia
Spanners
performance	1	performance