This is an internal function to do the rounding on all numeric elements of the table for comparability with external sources that use rounding.
round_table(data_table, digits = NULL)
A tibble with a key row and a symmetric matrix, after removing all empty columns and rows at the same time.
A symmetric input-output table, or a use table, or a supply table, or a margin or a tax table.
Number of digits for rounding.