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dplR

Overview

Perform tree-ring analyses such as detrending, chronology building, and crossdating. Read and write standard file formats used in dendrochronology.

Installation

The latest release version of dplR is installed from CRAN as follows:

install.packages("dplR")

The development version can be installed with devtools (install.packages("devtools")):

devtools::install_github("andybunn/dplR")

Vignettes

There are several vignettes for working with dplR. These cover common data task like I/O, detrending, chronology building, some time-series analysis and so on.

browseVignettes(package = "dplR")

Users interested in crossdating should visit the xDater app.

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Version

Install

install.packages('dplR')

Monthly Downloads

3,671

Version

1.7.2

License

GPL (>= 2)

Issues

Pull Requests

Stars

Forks

Repository

https://github.com/AndyBunn/dplR

Maintainer

Andy Bunn

Last Published

January 31st, 2021

Functions in dplR (1.7.2)

Twisted Tree Heartrot Hill Standard Chronology

Campito Mountain Tree Ring Widths

chron.stabilized

Build Mean Value Chronology with Stabilized Variance

Basal Area Increment (Inside Out)

Rothenburg Tree Ring Widths

Basal Area Increment (Outside In)

C-Method Standardization

Cross-Correlation between a Series and a Master Chronology

Build Mean Value Chronology

common.interval

Common Interval

Compute Correlations between Series

Plot a Tree-Ring Chronology

corr.series.seg

Compute Correlation between a Series and a Master Chronology

Schulman Old Tree No. 1, Mesa Verde

Detrend a Ring-Width Series

Combine Tree-Ring Data Sets

Smoothing Spline with User-Specified Rigidity and Frequency Cutoff

Ponderosa Pine Stem Diameters and Bark Thickness (gp.rwl)

Defunct functions in dplR

Calculate Gleichl<U+00E4>ufigkeit

Dendrochronology Program Library in R

Ponderosa Pine Pith Offsets Corresponding to gp.rwl

fill.internal.NA

Fill Internal NA

Perform a Continuous Morlet Wavelet Transform

Read Ring Width File from CSV

Ponderosa Pine Ring Widths from Gus Pearson Natural Area

Detrend Multiple Ring-Width Series Simultaneously

Edit a Ring-Width Series

Convert Character Strings for Use with LaTeX

Date Conversion to Character in LaTeX Format

Regional Curve Standardization

Ponderosa Pine Distance to Pith Corresponding to gp.rwl

Add Raster Elements to Plot

Calculates Pointer Years from a Group of Ring-Width Series

Power Transformation of Tree-Ring Data

interseries.cor

Individual Series Correlation Against a Master Chronology

Plotting Rwl Objects

Convert Pith Offset to Wood Completeness

Low-pass, high-pass, band-pass, and stop-pass filtering

Calculate the Gini Coefficient

Plotting crs Objects

Printing Redfit Results

rwi.stats.running

(Running Window) Statistics on Detrended Ring-Width Series

Synchronous Growth Changes

Do some reporting on a RWL object

print.rwl.report

Do some reporting on a RWL object

Read Tucson Format Ring Width File

Red-Noise Spectra of Time-Series

Write DPL Compact Format Ring Width File

Convert Wood Completeness to Pith Offset

Plot a Continuous Wavelet Transform

Calculate Mean Sensitivity on Series with a Trend

series.rwl.plot

Plot Series and a Master

Hurricane Ridge, Pacific silver fir

Read Ring Width File

Interactively Detrend Multiple Ring-Width Series

i.detrend.series

Interactively Detrend a Ring-Width Series

Crossdate an undated series

Skeleton Plot for Series and Master with Cross Correlation

Write Tree Ring Data Standard (TRiDaS) file

Calculate Descriptive Summary Statistics on Ring-Width Series

Superposed Epoch Analysis

Calculate Tukey's Biweight Robust Mean

Chronology Stripping by EPS

Read Tree Ring Data Standard (TRiDaS) File

Read DPL Compact Format Ring Width File

Read Tucson Format Chronology File

Write Tucson Format Chronology File

Calculate Mean Sensitivity

tridas.vocabulary

Browse and Check Standard TRiDaS Vocabulary

Read Heidelberg Format Ring Width File

Subsample Signal Strength

Calculate mean across cores in a tree

Retrieve or set the time values for rwl and crn objects

Read Site-Tree-Core IDs

Write Tucson Format Chronology File

Skeleton Plot for Series and Master

Write Chronology File