Changelog

Containedness checks for ‘n’ dimensional sets no longer require same length vectors if power is “n”

Bugfix in setcomplement (#65)
Impossible intervals containing only one elements with type not equal to [] are now equal to the empty set
Default ConditionalSet condition argument now function(x) TRUE
Print method for ConditionalSet now omits RHS if only "TRUE"

UniversalSet renamed Universal, old class will be removed in v0.4.0.
LogicalSet renamed Logicals, old class will be removed in v0.4.0.
Complex now inherits from Set, incorrect methods for isSubset, equals have been removed.
Add Multiset for sets with non-unique elements but no ordering
Small speed improvements in Tuple and FuzzyTuple
For consistency most methods now return a list unless single elements requested
Printing of ConditionalSet is fixed
Rationals and child-classes now error on calls to contains, isSubset, equals as any prior results were likely wrong/misleading
Removed erroneous complex boundaries in Interval class

Speed performance improvements for $contains method for Interval and Set. Rcpp now used for Interval.
Now for any Interval if not bounded above and upper is Inf then max = .Machine$double.xmax, analogously for lower.
Default universe of Interval is now ExtendedReals
Added default as.Set and as.Interval S3 methods

Updated documentation to be compatible with roxygen2
Fixed bug in typed Complex sets
Added universe assertion check to Set constructor
Bug fix in setunion causing some intervals not to be combined correctly
Interval$isSubset now compares sets using max and min instead of upper and lower
Calculation of min and max in Interval now uses 1e-15 instead of .Machine$double.xmin
$elements now always returns a list

Add $add public method to sets, which mutates sets by adding given elements, and coercing to the typed-set class if appropriate
Add $remove public method to sets, which mutates sets by removing given elements.
Add assertion for checking if elements contained in a set, test/check/assertContains.
Add assertion for checking if sets are subsets of another, test/check/assertSubset.

absComplement method is now deprecated, instead use setcomplement and omit the y argument
Fixed error in contains default caused by %inset%
Improved printing of SpecialSets when zero == TRUE
Added UniversalSet for the set containing all elements
Changed default universe of sets to UniversalSet
Coercions now error instead of producing a message when they fail
On construction, Sets no longer guess the set class, instead an extra class argument is added to give a set the typed property
The internal Set structure is slightly changed so that set elements are now stored in lists by default, which is only changed if the set is typed
Added element argument to Set constructor, which takes a list. This is more efficient if passing lists of lists or lists of multiple types, and in line with the FuzzySet constructor
Improved printing of ConditionalSets
Updated powerset to always return a Set of Sets (even if input is Tuple)
Fixed bug in Properties causing an error if cardinality was too large
Updated documentation
Reduced Set constructor bottleneck by adding ‘typed’ sets
Changed use_unicode default to l10n_info()$UTF-8

set6 upgrades the sets package to R6. Many forms of mathematical sets are implemented, including (countably finite) sets, tuples, intervals (countably infinite or uncountable), and fuzzy variants. Wrappers extend functionality by allowing symbolic representations of complex operations on sets, including unions, (cartesian) products, exponentiation, and differences (asymmetric and symmetric).
See the website for more details and the project readme
See getting started vignette for a short tutorial and introduction
set6 is currently ‘maturing’, so whilst no major updates are planned they may happen. Constant minor updates should be expected.

set6 0.2.4.9000 Unreleased