This blog is updated daily.
A general description is here.
New ‘head()’ and ‘tail()’ methods for class ‘"ts"’ time series, proposed by Spencer Graves on R-devel.
New ‘qr.influence()’, a “bare bones” interface to the ‘lm.influence()’ leave-one-out diagnostics computations; wished for in PR#18739.
Some non-API entry points have been added to those reported by ‘R CMD check’: ‘SYMVALUE’, ‘INTERNAL’, ‘DDVAL’, ‘ENSURE_NAMEDMAX’, ‘NAMED’, ‘COMPLEX0’, ‘REAL0’, ‘LEVELS’, ‘FRAME’, ‘HASHTAB’, ‘IS_ASCII’, ‘IS_UTF8’. Any declarations for these in public header files will be removed in the near future, and they will be hidden where possible.
New API functions ‘R_ClosureFormals’, ‘R_ClosureBody’, and ‘R_ClosureEnv’ for extracting closure components. The existing functions ‘R_ClosureExpr’ and ‘R_BytecodeExpr’ have also been added to the API.