ronaldvisser/sgc

Code and data used for the SGC

SGC

Code and data used to calculate the SGC (Synchronous Growth Changes), SSGC (Semi-Synchronous Growth Changes) and related functions and scripts.

Published as:

Visser, RM. 2021 On the similarity of tree-ring patterns: Assessing the influence of semi-synchronous growth changes on the Gleichläufigkeitskoeffizient for big tree-ring data sets. Archaeometry 63(1): 204–215. DOI: https://doi.org/10.1111/arcm.12600.

The volume of some of the underlying data was too big to deposit in GitHub and can be found elsewhere:

Visser, R. 2024. Similarity data set used to test Synchronous Growth Changes (SGC) on dendrochronological data using tree-ring series from the ITRDB [Data set]. Zenodo. https://doi.org/10.5281/zenodo.10866272

sgc's Issues

hooks to make dplR integration easier

Hi Ronald, for incorporation into {dplR} I suggest adding something like this into the functions as checks on arguments x and overlap:

  if(!("rwl" %in% class(x))) warning("'x' is not class rwl")
  if(any(length(overlap)!=1 | !is.numeric(overlap) | 
         overlap%%1!=0 | overlap < 1)){
    stop("'overlap' should be a single integer >0")
  }

Although I'm not sure what an appropriate value for overlap might be.

I'd advocate changing GLK to glk and SGC to sgc for to be consistent with {dplR}. I'm happy to make any of these changes on the {dplR} repo or they can happen here.

Thanks for working on this. -A