\item{countries}{the three letters code (e.g. "DEU") or "all".
If "all" is included, all available countries are loaded.}
\item{NUTS.Year}{a numeric vector, the year of NUTS (2003,2006,2010,2013,2016).}
}
\description{
this function related to converting NUTS between different NUTS version in both directions.
}
\examples{
## NOT run:
NUTS.convert.all(str_data$info, "DEU", 2016)
NUTS.convert.all(str_data$info, "all", 2016)
NUTS.convert.all(str_data$info, c("DEU","POL","UKI"), 2016)
## End (NOT run)
}