rwl.stats {dplR} | R Documentation |
This function calculates descriptive statistics on a data.frame
of
raw or detrended ring-width series.
rwl.stats(rwl)
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 ). |
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.
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
).
Andy Bunn
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.
data(ca533) rwl.stats(ca533)