Returns character value previously stored in variable or data
frame's label attribute, or NA if none found.
label(x, all = FALSE, fallback = FALSE, simplify = FALSE)An R object to extract labels from
Logical. When x is a data frame, setting this argument to TRUE will
make the function return all variable labels. By default, its value is FALSE,
so that if x is a data frame, it is the data frame's label that will be returned.
a logical value indicating if labels should fallback to object name(s).
Defaults to FALSE.
When x is a data frame and all = TRUE, coerce results to a vector
when TRUE, otherwise (default) return a named list containing only
non-NULL/non-NA elements.