Overal function for Splechtna et al. 2005 type of releases analysis.

Description

Splechtna is a combination of radial-growth averaging and boundary-line technique.

Usage

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splechtnaALL(data, releases = NULL, m1 = 10, m2 = 10, boundary = NULL, 
  buffer = 2, drawing = TRUE, criteria = 0.2, criteria2 = 0.5, 
  segment = 0.5, segment2 = 0.5, prefix = "sp", gfun = mean, 
  length = 2, notop = 10, notop2 = 10, storedev = pdf, ...)

Arguments

data

A data.frame with series as columns and years as rows such as that produced by read.* function of dplR .

releases

Optional parameter usable for precomputed releases.

m1

Determines the number of years to be averaged (including target year) for period prior the potential releas.

m2

Determines the number of years to be averaged (including target year) for period prior the potential releas.

boundary

Boundary line function of one argument, eg. boundary=function(x) {5.0067*exp(-0.664*x)}

buffer

Number of years determining how close to one another two releases can be.

criteria

Threshold for detection of moderate release

criteria2

Threshold for detection of major release.

segment

Determines length of the segment on which prior growth will be divided

segment2

Determines length of the segment on which first mm of prior growth will be divided.

prefix

Prefix of saved files.

gfun

Determines if M1 and M2 values are mean or median for selected period.

length

Determines how many years have to be given critera exceeded to be considered as release.

notop

Number of highest data points for fitting the boundary line.

notop2

Number of highest data points for fitting the boundary line in the segments for first mm.

storedev

Format for saving the graphical outputs, eg. pdf or jpeg.

drawing

If TRUE, graphical outputs for individual trees.

...

Details

Splechtna is a combination of radial-growth averaging and boundary-line technique. This method was developed by Splechtna, Gratzer & Black (2005) and as a potential release accepts only growth pulses exceeding 50% growth change according to Nowacki & Abrams (1997). Only these potential releases were then scaled relative to the boundary line.

Value

Write many tables and figures in the current directory.

Note

Cehck the reference.

Author(s)

Pavel Fibich <pavel.fibich@prf.jcu.cz>, Jan Altman <altman.jan@gmail.com>, Tuomas Aakala <tuomas.aakala@helsinki.fi>, Jiri Dolezal <jiriddolezal@gmail.com>

References

Splechtna, B.E., Gratzer, G. & Black, B.A. 2005. Disturbance history of a European old-growth mixed-species forest - A spatial dendro-ecological analysis. Journal of Vegetation Science, 16, 511-522.

See Also

splechtna, doAll

Examples

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data(relData)
splechtnaALL(relData1)
splechtnaALL(relData1,length=3,buffer=4,storedev=pdf,boundary=function(x) {5.0067*exp(-0.664*x)} )