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A general description is here.
‘plot.data.frame()’ now supports a ‘formula’ argument.
Error messages from failed Rd \Sexpr code now include the call from the original condition (if available). Warning messages now include Rd source locations.
‘R CMD check’ ‘NOTE’s on the use of these non-API entry points have been upgraded to ‘WARNING’s in preparation for removing declarations and, where possible, hiding these entry points: ‘R_nchar’, ‘VECTOR_PTR’, ‘R_tryWrap’, ‘Rf_NonNullStringMatch’, ‘Rf_isValidString’ ‘Rf_GetOption’, ‘SET_FRAME’, ‘SET_HASHTAB’, ‘SET_ENCLOS’, ‘STDVEC_DATAPTR’, ‘SET_S4_OBJECT’, ‘UNSET_S4_OBJECT’, ‘SET_NAMED’, ‘R_lsInternal’, ‘Rf_lazy_duplicate’, ‘EXTPTR_PROT’, ‘EXTPTR_PTR’, ‘EXTPTR_TAG’, ‘NAMED’, ‘FRAME’, ‘HASHTAB’, ‘IS_S4_OBJECT’, ‘BODY’, ‘FORMALS’, ‘CLOENV’, ‘ENCLOS’, ‘OBJECT’, ‘SET_TYPEOF’, ‘ENVFLAGS’, ‘SET_ENVFLAGS’, ‘SET_FORMALS’, ‘SET_BODY’, ‘SET_CLOENV’, ‘STRING_PTR’, ‘DATAPTR’, ‘XTRUELENGTH’, ‘R_duplicate_attr’, ‘R_shallow_duplicate_attr’, ‘getConnection’, ‘LEVELS’, ‘SETLEVELS’, ‘R_data_class’, ‘SET_GROWABLE_BIT’, ‘TRUELENGTH’, ‘SET_TRUELENGTH’, ‘SETLENGTH’.
New function ‘R_getAttributes’ returns the same result as the R function ‘attributes’. New functions ‘R_getAttribCount’, ‘R_getAttribNames’, ‘R_hasAttrib’, ‘R_nrow’, and ‘R_ncol’.
The function ‘Rf_isFrame’ has been removed; use ‘Rf_isDataFrame’ instead.