rwl.stats {dplR}R Documentation

Calculates Descriptive Statistics on Ring Width Series

Description

This function calculates descriptive statistics on a data.frame of raw or detrended ring-width series.

Usage

  rwl.stats(rwl)

Arguments

rwl a data.frame with (usually) raw ring-width series as columns and years as rows such as that produced by read.rwl. It is sometimes desireable to run this on detrended (e.g., rwi) data particularly for the sensitivity measures ( sens1, sens2, gini.coef).

Details

This calculates a variety of descriptive statistics commonly used in dendrochronology (see below). Users unfamiliar with these should see Cook and Kairiukstis (1990) and Fritts (2001) for further details.

Value

A data.frame containing descriptive stats on each series. These are the first and last year of the series as well as the length of the series (first,last,year). The mean, median, standard deviation are given (mean,median, stdev) as are the skewness, two measures of sensitivity, the Gini coefficent, and first order autocorrelation (skew,sens1, sens2, gini.coef, ar1).

Author(s)

Andy Bunn

References

Cook, E.R. and Kairiukstis, L.A. (1990) Methods of Dendrochronology: Applications in the Environmental Sciences. Springer. ISBN-13: 978-0792305866.

Fritts, H.C. (2001) Tree Rings and Climate. Blackburn. ISBN-13: 978-1930665392.

See Also

rwi.stats, read.rwl

Examples


  data(ca533)
  rwl.stats(ca533)


[Package dplR version 1.1.8 Index]