R: Interactively Detrend Multiple Ring-Width Series

i.detrend {dplR} | R Documentation

## Interactively Detrend Multiple Ring-Width Series

### Description

Interactively detrend multiple tree-ring series by one of two methods, a smoothing spline or a statistical model. This is a wrapper for `detrend.series`.

### Usage

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

### Arguments

`rwl` | a `data.frame` with series as columns and years as rows such as that produced by `read.rwl` or `ca533`
`y.name` | a `character` vector of length `ncol(rwl)` that gives the ID of each series. Defaults to the column names of `rwl`.
`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 detrending curves based on plots that are produced by `detrend.series` for which it is essentially a wrapper. The user enters their choice of detrended method via keyboard at a prompt for each ring width series in `rwl`. See `detrend.series` for examples and details on the detrending methods.

### Value

A `data.frame` containing each detrended series according to the method used as columns and rownames set to `colnames(y)`. These are typically years. Plots are also produced as the user chooses the detrending methods through keyboard input.

### Author(s)

Andy Bunn

### See Also

`detrend.series`

[Package dplR version 1.7.1 Index]