arules_1.6-3

New Features

• read.transactions gained parameter header to read files with column headers.

Bug Fixes

• Fixed PROTECT placement in C code discovered by rchk.
• S4 objects use now show instead of print.

arules_1.6-2

New Features

• discretizeDF now understands the method "none" which skips discretization.
• discretizeDF now reports which column produces the problem.

Changes

• transactions: numeric columns are now discretized during coersion using discretizeDF (with a warning).

Bug Fixes

• The spurious warning for reaching maxlen in apriori is now removed (reported by Ryan J. Cole).
• Fixed matrix check in function dissimilarity.

arules_1.6-1

Bug Fixes

• discretize now handles NAs in equal frequency (reported by yarik1988).
• interestMeasure: fixed error when an itemset/rules object of length 0 is provided.

New Features

• rules and itemsets gained a method for nitems.

arules_1.6-0

Major Changes

• discretize: the default method is now "frequency" and categories was
  renamed breaks to be consistent with cut in R-base.

New Features

• Added interest measure "importance".
• Added method items for transactions.
• Added discretizeDF to apply discretization to all numeric
  columns in a data.frame.

Bug Fixes

• Fixed typo in inspect for tidLists (reported by Carlos Chavarria).
• Fixed bug in %in% for itemMatrix (reported by Henrique Lemos)

arules_1.5-5

New Features

• Added (absolut support) "count" as an interest measure.
• itemLabels can now be assigned for rules and itemsets.

Bug Fixes

• Fixed bug in subset with signature itemMatrix, itemMatrix (reported by rwdvc).
• Fixed pointer punning warning.

arules_1.5-4

New Features

• Improved speed for read.transactions with format = "single" significantly.
• Appearance for apriori now guesses the default parameter automatically and
  does some more checking, making the specification of templates easier.

Bug Fixes

• Fixed null pointer in error message code.
• head does now not result in an error for empty rule sets
  (bug reported by cornejom).

arules_1.5-3

New Features

• apriori and eclat return now count (absolute support count) in the
  quality data.frame.
• Added %oin% to find transactions/itemsets that ONLY contain certain items.

Bug Fixes

• Improved PROTECT placement in C source code.
• itemMeasures for single rules/itemssets now returns a proper data.frame
  (reported by lordbitin).
• itemMeasures: Added missing parentheses in kappa calculation and fixed
  equation for least contradiction (reported by Feng Chen).

arules 1.5-2

New Features from arules 1.5-2

• apriori: maxtime = 0 disables the time limit.
• is.subset/is.superset uses now fast and memory efficient C code
  for sparse computation (contributed by Ian Johnson).
  sparse = TRUE is now the default. Note that the result is now a
  sparse matrix.

New Features from arules 1.5-1

• Added interest measure maxConf.
• is.significant now supports in addition to Fisher's exact test,
  the chi-squared test.
• interest measures Fisher's exact test and chi-squared
  (using significance = TRUE) can now produce p-values for
  substitutes (with complements = FALSE).
• Added function DATAFRAME for more control over coercion to data.frame
  (e.g., use separate columns for LHS and RHS of rules).

arules_1.5-0

Changes in version 1.5-0 (09/23/2016)

• IMPORTANT CHANGE: apriori uses now a time limit set in parameter with
  maxtime. The default is 5 seconds. Running out of time or maxlen results
  in a warning. The warning for low absolute support was removed.
• is.redundant now also marks rules with the same confidence as redundant.
• plot for associations and transactions produces now a better
  error/warning message.
• improved argument check for %pin%. Warns now for multiple patterns
  (was an error) and give an error for empty pattern.
• inspect prints now consistently the index of rules/itemsets using brackets
  and starting from 1.

arules_1.4-2

Changes in version 1.4-2 (08/06/2016)

• Bugfix: is.redundant returned !is.redundant (reported by brisbia)
• Duplicate items when coercing from list to transactions are now
  removed with a warning.