dplR (version 1.4.9)

i.detrend.series: Interactively Detrend a Ring-Width Series

Description

Interactively detrend a tree-ring series by one of three methods, a smoothing spline, a linear model, or the mean. This is a wrapper for detrend.series.

Usage

i.detrend.series(y, y.name = NULL, nyrs = NULL, f = 0.5, pos.slope = FALSE)

Arguments

y

a numeric vector. Usually a tree-ring series.

y.name

an optional character vector to name the series for plotting purposes.

nyrs

a number giving the rigidity of the smoothing spline, defaults to 0.67 of series length if nyrs is NULL.

f

a number between 0 and 1 giving the frequency response or wavelength cutoff. Defaults to 0.5.

pos.slope

a logical flag. Will allow for a positive slope to be used in method ModNegExp. If FALSE the line will be horizontal.

Value

• A vector containing the detrended series (y) according to the method used with names set to colnames(y). These are typically years. A plot is also produced and the user chooses a method through keyboard input.

Details

This function allows a user to choose a detrending method based on a plot that is produced by detrend.series for which it is essentially a wrapper. The user enters their choice of detrended method via keyboard at a prompt. See detrend.series for examples and details on the detrending methods.

See Also

detrend.series