An R package for modelling tree/climate relationships. The package features:
library(treeclim)
munich_spruce_calib <- dcc(muc_spruce, muc_clim)
plot(munich_spruce_calib)
skills(munich_spruce_calib)
See the docs and the wiki for details.
Zang, C., and F. Biondi. 2015. treeclim: an R package for the numerical calibration of proxy-climate relationships. Ecography 38:431–436.