The Dendrochronology Program Library in R (dplR)
dplR is a software package in the R statistical programming environment for tree-ring analyses. R is the world's preeminent open-source statistical computing environment where users can contribute packages, which are freely available on the internet. dplR can read standard format files and perform several standard analyses. These include interactive detrending, chronology building, and calculating standard descriptive statistics. The package can also produce a variety of publication quality plots.
A continuous wavelet transform of a long tree-ring crhonology produced by the wavelet.plot() function
There are two papers that describe dplR:
Bunn, A.G. 2008. A dendrochronology program library in R (dplR). Dendrochronologia, 26: 115-124.
Here is the link to the library on the Comprehensive R Archive Network where you can download the source code or precompiled binaries. Within R, dplR can be installed, loaded, and the help pages can be seen via:
> install.packages("dplR")
> library(dplR)
> ?dplR
dplR is updated regularly. Please update to the current version from time to time. It's good R practice:
> update.packages()
