\Header{treering}{Yearly Treering Data, -6000--1979}
\keyword{datasets}{treering}
\begin{Description}\relax
Contains normalized tree-ring widths in dimensionless units.
\end{Description}
\begin{Usage}
\begin{verbatim}
data(treering)
\end{verbatim}
\end{Usage}
\begin{Format}\relax
A univariate time series with 7981 observations. The object is of
class \code{"ts"}.

Each tree ring corresponds to one year.
\end{Format}
\begin{Details}\relax
The data were recorded by Donald A. Graybill, 1980, from 
Gt Basin Bristlecone Pine 2805M, 3726-11810 in Methuselah Walk, California.
\end{Details}
\begin{Source}\relax
Time Series Data Library:
\url{http://www-personal.buseco.monash.edu.au/~hyndman/TSDL/},
series \file{CA535.DAT}
\end{Source}
\begin{References}\relax
For background on Bristlecone pines and Methuselah Walk, see
\url{http://www.sonic.net/bristlecone/}; for some photos see
\url{http://www.ltrr.arizona.edu/~hallman/sitephotos/meth.html}
\end{References}

