dplR (version 1.7.6)

common.interval: Common Interval

Description

This function finds the common interval on a set of tree-ring widths such as that produced by read.rwl.

Usage

common.interval(rwl, type=c("series", "years", "both"),
                make.plot=TRUE)

Value

A data.frame with colnames(x) and

rownames(x).

Arguments

rwl

a data.frame of ring widths with rownames(x) containing years and colnames(x) containing each series ID such as produced by read.rwl

type

a character string of "series", "years", or "both". Argument matching is performed.

make.plot

a logical indicating if a plot should be drawn

Author

Filipe Campelo, Andy Bunn and Mikko Korpela

Details

This trims an rwl object to a common interval that maximizes the number of series (type="series"), the number of years (type="years"), or a compromise between the two (type="both"). A modified seg.plot can be drawn as well.

See Also

seg.plot

Examples

library(utils)
data(co021)
co021.s <- common.interval(co021, type="series", make.plot=TRUE)
co021.y <- common.interval(co021, type="years", make.plot=TRUE)
co021.b <- common.interval(co021, type="both", make.plot=TRUE)

dim(co021)
dim.s <- dim(co021.s)
dim.s       # the highest number of series
prod(dim.s) #   (33 series x 288 years = 9504)
dim.y <- dim(co021.y)
dim.y       # the highest number of years
prod(dim.y) #   (27 series x 458 years = 12366)
dim.b <- dim(co021.b)
dim.b       # compromise solution
prod(dim.b) #   (28 series x 435 years = 12180)