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A general description is here.
New function ‘proportions()’ and ‘marginSums()’. The intention is that these should eventually replace the unfortunately named ‘prop.table()’ and ‘margin.table()’. They can be drop-in replacements, but also adds named-margin functionality.
‘sweep()’ and ‘slice.index()’ can now use names of dimnames for their ‘MARGIN’ argument (‘apply’ has had this for almost a decade). These functions, and also ‘asplit()’ have had the name of their first argument changed to ‘X’ for consistency with ‘apply()’
‘mle()’ in the ‘stats4’ package had problems combining use of box constraints and fixed starting values (in particular, confidence intervals were affected).
Uses of ‘url(gzcon(.))’ needing to extend buffer size have failed (with HTTP/2 servers), reported by Gábor Csárdi.