dplR: i.detrend.series – R documentation

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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.

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.

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.

Author(s)

Andy Bunn. Patched and improved by Mikko Korpela.