This function converts
labelled class vectors
into a generic data format, which means that simply all
class attributes will be removed, so all vectors / variables will most
unlabel(x, verbose = FALSE)
A data frame, which contains
vectors or a single vector of class
TRUE, a progress bar is displayed that indicates
the progress of converting the imported data.
A data frame or single vector (depending on
x) with common object classes.
This function is currently only used to avoid possible compatibility issues
labelled class vectors. Some known issues with
labelled class vectors have already been fixed, so
it might be that this function will become redundant in the future.