novak_weibull: novak_weibull

Description Usage Arguments Value References See Also Examples

View source: R/false_ring_proportion.R

Description

Fit a Weibull function for the calculation of age corrected IADF frequencies according to Novak et al. (2013).

Usage

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novak_weibull(novak_freq_object, min.n = 15, start = NULL, max.iter = 500,
  make.plot = TRUE, ...)

Arguments

novak_freq_object

A novak_freq_object as obtained from novak_freq

min.n

minimum number of samples within each cambial age to be included in model estimation

start

set custom start values - default to list(a = 4, b = 0.33, c = 15.5)

max.iter

maximum iterations for internally used nls

make.plot

logical

...

additional plotting arguments

Value

a model object of class "nls"

References

Novak, Klemen and S<c3><a1>nchez, Miguel Angel Saz and <c4><8c>ufar, Katarina and Ravent<c3><b3>s, Josep and de Luis, Martin, te and intra-annual density fluctuations in in Spain, IAWA Journal, 34, 459-474 (2013), DOI:https://doi.org/10.1163/22941932-00000037 http://booksandjournals.brillonline.com/content/journals/10.1163/22941932-00000037.

See Also

novak_freq, novak_index

Examples

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data('example_iadf')
model <- novak_weibull(novak_freq(example_iadf), 15)
novak_index(example_iadf, model)

konradmayer/iadf documentation built on June 9, 2017, 2:50 a.m.