R: Interactively Detrend a Ring-Width Series

i.detrend.series {dplR} | R Documentation

## 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.

### See Also

`detrend.series`

[Package dplR version 1.7.2 Index]