\HeaderA{fgl}{Measurements of Forensic Glass Fragments}{fgl}
\keyword{datasets}{fgl}
\begin{Description}\relax
The \code{fgl} data frame has 214 rows and 10 columns.
It was collected by B. German on fragments of glass
collected in forensic work.
\end{Description}
\begin{Usage}
\begin{verbatim}
fgl
\end{verbatim}
\end{Usage}
\begin{Format}\relax
This data frame contains the following columns:
\describe{
\item[\code{RI}] refractive index; more precisely the refractive index is 1.518xxxx.

The next 8 measurements are percentages by weight of oxides.

\item[\code{Na}] sodium.
\item[\code{Mg}] manganese.
\item[\code{Al}] aluminium.
\item[\code{Si}] silicon.
\item[\code{K}] potassium.
\item[\code{Ca}] calcium.
\item[\code{Ba}] barium.
\item[\code{Fe}] iron.
\item[\code{type}] The fragments were originally classed into seven types, one of which
was absent in this dataset.  The categories which occur are
window float glass (\code{WinF}: 70),
window non-float glass (\code{WinNF}: 76),
vehicle window glass (\code{Veh}: 17),
containers (\code{Con}: 13),
tableware (\code{Tabl}: 9) and
vehicle headlamps (\code{Head}: 29).

}
\end{Format}
\begin{References}\relax
Venables, W. N. and Ripley, B. D. (2002)
\emph{Modern Applied Statistics with S.} Fourth edition.  Springer.
\end{References}

