\Header{pigs}{The Effect of Vitamin C on Tooth Growth in Guinea Pigs}
\keyword{datasets}{pigs}
\begin{Usage}
\begin{verbatim}data(pigs)\end{verbatim}
\end{Usage}
\begin{Format}
A data frame with 60 observations on 3 variables.
\Tabular{rlll}{
[,1]  & len   & numeric  & Tooth length\\{}
[,2]  & supp  & factor   & Supplement (VC or OJ).\\{}
[,3]  & dose  & numeric  & Dose in milligrams.
}\end{Format}
\begin{Description}
The response is the average length of odontoblasts (teeth) in
each of 10 guinea pigs.  Three dose levels 0.5, 1, and 2 mg
of juice and acid in the juice were used.

This makes no sense - check the original source.\end{Description}
\begin{Source}
C. I. Bliss (1952).  The Statistics of Bioassay, Academic Press.\end{Source}
\begin{References}
McNeil, D. R. (1977).  Interactive Data Analysis.  New York: Wiley.\end{References}

