getBorders: Get Tree-Ring Borders

In xRing: Identify and Measure Tree Rings on X-Ray Micro-Density Profiles

Get Tree-Ring Borders

Description

Identify tree-ring borders

Usage

getBorders(x, k = 3, minTrw = 3, threshold = 0.215, addLastBorder = FALSE)

Arguments

x	an object of class "xRing"
k	integer; width of the rolling window
minTrw	integer; width of the narrowest tree-ring, rings narrower than this value will not be considered
threshold	the minimum difference between the local maximum and minimum density to detect tree-ring borders
addLastBorder	logical; if FALSE the last border is not added. If TRUE the last border is placed at the position of the last value.

Details

This function uses local maximum and minimum densities in order to detect tree-ring borders.

Value

The getBorders function returns an object of lass "xRing" including the following elements:

names a string giving the series name

span the first and last year

trw a data.frame with tree-ring width

limits a vector with the position of the tree-ring borders

years a vector with the calendar year

profile.raw a vector with the raw X-ray values

profile a vector with the the smoothed X-ray values (if is supplied in the input)

Examples

data("PaPiRaw")
data("PaPiSpan")
AFO1001a <- toxRing(PaPiRaw, PaPiSpan, "AFO1001a")
AFO1001a <- getBorders(AFO1001a)

AFO1001a <- toxRing(PaPiRaw, seriesName = "AFO1001a")
AFO1001a <- getBorders(AFO1001a)

xRing documentation built on April 22, 2022, 5:05 p.m.