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A general description is here.
‘zip()’ passes its list of files _via_ standard input to the external command when too long for the command line (on some platforms).
‘data()’ gains an ‘overwrite’ argument.
‘seq.default()’ is more careful to return an ‘integer’ (as opposed to ‘double’) result when its arguments are large and/or classed objects; see comment #9 of Suharto Anggono's PR#17497.
The ‘plot()’ method for ‘lm’ and ‘glm’ fits, ‘plot.lm()’, gains a new option ‘iter.smooth’ with a default of ‘0’ for binomial fits, no longer down-weighting when smoothing the residuals.
‘zip()’ passes the list of files to compress via standard input to the
external command when too large for the command line.
In the definition of an S4 class, prototype elements are checked against the slots of the class, with giving a prototype for an undefined slot now being an error. (Reported by Bill Dunlap.)