Reclassify specified columns as metadata or list metadata columns in a data.table

This function reclassifies specified columns of a data.table to the 'qe.metadata' format if column names are provided. If no column names are provided, it returns the names of columns that are already classified as 'qe.metadata'.

Usage

metadata(x, ...)

Arguments

x

A data.table. The data.table containing the columns to be reclassified or checked.

...

Additional arguments specifying the names of the columns to be reclassified.

Value

The modified data.table with specified columns reclassified as 'qe.metadata', or a character vector of column names already classified as 'qe.metadata'.

Examples

library(data.table)
dt <- data.table(a = 1:5, b = 6:10)
# Reclassify columns 'a' and 'b' as 'qe.metadata'
dt <- metadata(dt, "a", "b")
# List columns classified as 'qe.metadata'
metadata_columns <- metadata(dt)