| % File src/library/datasets/man/treering.Rd |
| % Part of the R package, https://www.R-project.org |
| % Copyright 1995-2017 R Core Team |
| % Distributed under GPL 2 or later |
| |
| \name{treering} |
| \docType{data} |
| \alias{treering} |
| \title{ |
| Yearly Treering Data, -6000--1979 |
| } |
| \description{ |
| Contains normalized tree-ring widths in dimensionless units. |
| } |
| \usage{ |
| treering |
| } |
| \format{ |
| A univariate time series with 7981 observations. The object is of |
| class \code{"ts"}. |
| |
| Each tree ring corresponds to one year. |
| } |
| \details{ |
| The data were recorded by Donald A. Graybill, 1980, from |
| Gt Basin Bristlecone Pine 2805M, 3726-11810 in Methuselah Walk, California. |
| } |
| \source{ |
| Time Series Data Library: |
| \url{http://www-personal.buseco.monash.edu.au/~hyndman/TSDL/}, |
| series \file{CA535.DAT} |
| %% now pointing to \url{http://datamarket.com/data/list/?q=provider:tsdl} |
| %% or specifially to |
| %% \url{https://datamarket.com/data/set/22oy/} ==> short \url{http://data.is/2iSo2j1} |
| } |
| \references{ |
| For some photos of Methuselah Walk see |
| \url{https://web.archive.org/web/20110523225828/http://www.ltrr.arizona.edu/~hallman/sitephotos/meth.html} |
| } |
| \keyword{datasets} |