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A general description is here.
‘mean()’, ‘rank()’, ‘which()’, ‘barplot()’, ‘boxplot()’, ‘contour()’, ‘polygon()’ and ‘methods::is()’ have more robust sanity checks on some of their arguments.
‘legend()’ is now vectorized for arguments ‘cex’, ‘x.intersp’, and ‘text.width’. The latter can now also be specified as a vector (one element for each column of the legend) or as ‘NA’ for computing a proper column wise maximum value of ‘strwidth(legend)’. The argument ‘y.intersp’ can be specified as a vector with one entry for each row of the legend.
‘legend()’ also gains new arguments ‘title.cex’ and ‘title.font’. Thanks to Swetlana Herbrandt.