Some time ago I wrotte a post : An introduction to the "prospectr" package . There I gave a list of some Chemometric Packages for R. Some days ago in a NIRS forum gave the name of another Chemometric package, so the options to use Chemometrics with R are growing day by day.
This package is "Resamble". This is the link to the reference Manual.
More details at:
The author explains that with this package algorithms such as LOCAL and locally weighted PLS regression can be easily reproduced.
I really want to test it as soon as I can.