novak_freq {iadf}

iadf frequency per cambial age

Description

Calculate the frequency per cambial age as suggested by Novak et al. (2013).

Usage

novak_freq(iadf, po = NULL)

Arguments

iadf

A data frame with numeric columns representing individual series and years as rownames where years with IADF are marked binary with 1, those without with 0, years not covered by the series are set to NA.

po

a data frame with pith offsets with series names in the first and pith offset as number of rings in the second column

Value

a data frame

References

Novak, Klemen and Sánchez, Miguel Angel Saz and Čufar, Katarina and Raventós, Josep and de Luis, Martin. Age, climate and intra-annual density fluctuations in in Spain, IAWA Journal, 34, 459-474 (2013), doi:10.1163/22941932-00000037

See Also

novak_weibull, novak_index

Examples

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