rTG (radial Tree Growth) R package consists of methods to analyze seasonal radial tree growth data, such as xylem and phloem formation data.
You can install rTG using:
# devtools::install_github("jernejjevsenak/rTG")
install.packages("rTG", repos = c('https://jernejjevsenak.r-universe.dev', 'https://cloud.r-project.org')) # current version under development form GitHub
install.packages("rTG") # from CRAN