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arules 1.7-7 (11/28/2023)

Changes

• is.significant gained parameter reuse. The default for adjust was changed to “none.”
• improved some error messages.
• Added Wikipedia links to measures.md.
• Added interest measure LIC.

Bugfixes

• Fixed appearance code for fim4r (reported by mytarmail).

arules 1.7-6 (03/23/2023)

Changes

• Improved the interface for fim4r. support and confidence now uses [0, 1]; added verbose and originalSupport.

Bugfixes

• eclat and apriori now use the next smaller representable double for minsupp to make sure that >= minsupp works.

arules 1.7-5 (10/20/2022)

Bugfixes

• discretize(): dig.lab is now correctly passed on to cut() (reported by LectronPusher).
• Fixed C prototype warnings

arules 1.7-4 (8/16/2022)

Changes

• We install now the latest version of fim4r
• Changes in coercion for Matrix 1.4-2

Bugfixes

• eclat() now correctly returns frequent itemsets when all have exactly minsupport (reported by GauthierMagnin).

arules 1.7-3 (1/9/2022)

Changes

• Manual pages are now created using roxygen2.
• support() uses now explicit arguments instead of control.
• ruleInduction() uses now explicit arguments instead of control.

New Feature

• Added interface to fim4r algorithms.

arules 1.7-2 (12/09/2021)

New Feature

• The C APRIORI implementation can now mine frequent generator itemsets (contributed by Makh2018).

Bugfixes

• deparse1() needs R 4.0.0

arules 1.7-1 (11/18/2021)

Bugfixes

• Fixed some C issues: unsigned int in bitmat.c (function static int _exists) to ensure bit shifting works. The bitmap support buffer is now initialized with zeros.

arules 1.7-0 (11/12/2021)

New Feature

• Constructors and conversion
  • constructor transactions() can now also create transactions from data in long format (tid, item).
  • rules and itemsets have now a constructor.
  • toLongFormat converts transactions into a long format data.frame.
• Interest measures
  • interestMeasure for rules has now measure “table” which returns the contingency table.
  • new interest measure “riskRatio” was added.
  • interestMeasure for contingency table-based measures now accept the additional parameter smoothCounts which is added to each count to avoid counts of zero (Laplace smoothing).
  • new method for stats confint to calculate confidence intervals for some interest measures added.
  • is_redundant can now also use confidence intervals to determine statistical redundancy.
  • removed option “chiSquared” from crossTable.
• Mining algorithms
  • apriori and eclat gain … additional arguments are now added to the parameter list.
  • added new function is.generators to find itemset generators.
  • apriori and eclat now store the call in the info slot of the created associations.

Changes

• we use now a better check for installed suggested packages.
• inspect uses now a space after the comma.
• interestMeasures: reuse = TRUE now only reuses the basic measures of “support”, “confidence”, “coverage” and “lift”. All other measures are recalculated to account for possible differences in additional parameters.
• set methods are now also exported as S3 methods using package generics so they do not conflict with tidyverse (dplyr).

Bug Fixes

• fixed mistake in man page for weclat. Weight column needs to be called weight (reported by Alexander Ruth).
• frequent itemsets now do not report “transIdenticalToItemsets” (reported by galadrielbriere).
• fixed read.transactions reading in single format with header from a connection. First item is no longer dropped.

arules 1.6-8 (05/17/2021)

New Feature

• transactions have now a constructor function called transactions().
• Added new method compatible() to itemMatrix to check if the item coding is compatible between two objects.
• c() now produces a warning if two itemMatrices with different itemCoding are combined.
• encode and recode accept now for itemLabels also objects with an itemLabels method.
• recode is now also available for associations (itemsets and rules).

Changes

• recode: parameter match is now deprecated. Use itemLabels

Bug Fixes

• fixed addAggregate problem with character (reported by javiercoh).

arules 1.6-7 (03/12/2021)

New Features

• Added interest measure confidence boost (boost) with help from Jens Harbers, Cordes & Graefe KG.

Bug Fixes

• interest measure improvement now does not produce inf values if no subset rule can be found.

arules 1.6-6 (05/14/2020)

New Features

• added interestMeasure rhsSupport.
• added interestMeasure stdLift.
• addComplement now adds variables and levels to indicate what items are complments.

Changes

• apriori and eclat now by default also reports coverage (ext defaults to TRUE and lhs.support is now called coverage).
• addComplement now adds variables and levels itemInfo.
• discretize now drops non-unique breaks with a warning (instead of producing an error).

Bug Fixes

• DATAFRAME now works if itemsetInfo is empty.
• interestMeasure hyperlift now works without specifying transactions.
• Changed c() to as.integer() for factors (R has changed).

arules 1.6-5 (04/03/2020)

New Features

• improved speed for calculating interestMeasures for rules and itemsets with no available quality information or reuse = FALSE.
• Manual pages for associations were improved with examples for itemCoding.
• Manual page for interestMeasures is now linked with the associated web page.
• interest measure laplace (Laplace confidence) gained parameter k for the number of classes.

Bug Fixes

• read.transactions: Parameter encoding is now correctly passed on to scan (reported by Sisi-Wiciel).
• interestMeasure was not calculating count for itemsets (reported by clcazer).
• removed the duplicated interest measure: “descriptiveConfirm” use “confirmedConfidence” instead.

arules 1.6-4 (08/27/2019)

Bug Fixes

• Fixed rounding bug affecting is.closed (reported by clcazer).
• Fixed TYPO in Ralambondrainy Measure (reported by andreijl).

arules 1.6-3 (03/06/2019)

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 (12/02/2018)

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 coercion 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 (04/04/2018)

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 (2/28/2018)

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 (01/09/2018)

New Features

• Added (absolute 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 (10/12/2017)

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 (08/31/2017)

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/itemsets 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 (03/12/2017)

New Features

• 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.

arules 1.5-1 (01/23/2017)

New Features

• 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).

Bug Fixes

• Error message for sorting with an unknown interest measure.
• abbreviate works now for rules correctly.

Internal Changes

• Added registration code for native routines. This requires R 3.3.2.

arules 1.5-0 (09/23/2016)

Major Changes

• apriori uses now a time limit set in the parameter list 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.

Bug Fixes

• 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 (08/06/2016)

Bug Fixes

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

arules 1.4-1 (04/10/2016)

New Features

• added tail method for associations.
• added/fixed encoding for read.transactions

Bug Fixes

• Mutual information is now calculated correctly (reported by ddessommes).

arules 1.4-0 (03/18/2016)

New Features

• The transaction class lost slot transactionInfo (we use the itemsetInfo slot now). Note that you may have to rebuild some transaction sets if you are using transactionInfo.
• interestMeasure: performance improvement for “improvement” measure.
• sort: speed up sort by always sorting NAs last.
• head: added method head for associations for getting the best rules according to an interest measure faster than sorting all the associations first.
• abbreviate is now a S4 generic with S4 methods.

Bug Fixes

• combining item matrices with 0 rows (reported by C. Buchta).
• itemLabel recoding in is.subset (reported by sjain777).
• NAMESPACE export for %in%
• is.redundant: fixed and performance improvement.
• Groceries: fixed typo in dataset.

arules 1.3-1 (12/13/2015)

Major Changes

• we now require R 3.2.0 so cbind in Matrix works.

New Features

• is.maximal is now also available for rules.
• added is.significant for rules (uses Fishers exact test with correction).
• added is.redundant for rules.
• added support for multi-level analysis (aggregate).
• APparameter: confidence shows now NA for frequent itemsets.

arules 1.3-0 (11/11/2015)

New Features

• removed deprecated WRITE and SORT functions.
• subset extraction: added checks, handles now NAs and recycles for logical.
• read.transactions gained arguments skip and quote and some defaults for read and write (uses now quotes and no rownames by default) have changed.
• itemMatrix: coercion from matrix checks now for 0-1 matrix with a warning.
• APRIORI and ECLAT report now absolute minimum support.
• APRIORI: out-of-memory while rule building does now result in an error and not a memory fault.
• aggregate uses now ‘by’ instead of ‘itemLabels’ to conform to aggregate in base.

Bug Fixes

• ruleInduction: bug fix for missing confidence values and better checking (by C. Buchta).

arules 1.2-1 (09/20/2015)

New Features

• Added many new interest measures.
• interestMeasure: the formal argument method is now called measure (method is now deprecated).
• Added Mushroom dataset.
• Moved abbreviate from arulesViz to arules.

Bug Fixes

• fixed undefined behavior for left shift in reclat.c (reported by B. Ripley)

arules 1.2-0 (09/14/2015)

Major Changes

• added support for weighted association rule mining (by C. Buchta):
  • transactions can store weights a column called “weight” in transactionInfo.
  • support, itemFrequency and itemFrequencyPlot gained a parameter called weighted.
  • weclat extends eclat with transaction weights.
  • hits can be used to calculate weights from transact ions.
• We are transitioning to internally use consistently data.frames with the correct number of rows for quality, itemInfo, transactionInfo and itemsetInfo. These data.frames possibly have 0 columns.
• arules uses now testthat (tests are in tests/testthat).

New Features

• sort can now sort by several columns (used to break ties) in quality. It also gained an order parameter to return a permutation vector (order) instead.
• inspect gained parameters setStart, setEnd, itemSep, ruleSep and linebreak to control output better.
• read.transactions now ignores empty items (e.g., caused by trailing commas and leading or trailing white spaces).
• labels now returns not a list but consistent labels for objects
  (transactions, itemMatrix, rules, itemsets, and tidLists).
• tidLists has now an inspect method, gained coercion from “list”, and has now a replacement method for dimnames().
• Coercion from itemMatrix to matrix results now in a logical matrix.
• fixed as(transactions, “data.frame”). The column names do now have no prefix (except if transactionInfo contains an item called “items”).
• transactions has now its own dimnames function which correctly returns transactionID from transactionInfo as rownames.
• replacement method for dimnames() checks now dimensions.
• item labels are now internally handled as character using stringAsFactor = FALSE in data.frames and not AsIs with I(character).
• rules can now have no item in the RHS.

Bug Fixes

• fixed missing row labels for is.subset().

arules 1.1-9 (7/13/2015)

• More work on namespace.
• Fixed tests.

arules 1.1-7 (6/29/2015)

• itemUnion: fixed bug for large amounts of dense rules.
• crossTable gained arguments measure and sort.
• Fixed namespace imports for non-base default packages.

arules 1.1-6 (12/07/2014)

• dissimilarity method “pearson” is now set to 1 (max) for neg. correlation. Also added phi correlation coefficient.
• discretize method “cluster” accepts now … passed on to k-means (e.g., for nstart)
• merge for itemMatrix checks now for conformity
• as(…, “transactions”): binary attributes are now translated into items only if TRUE.

arules 1.1-5 (8/19/2014)

• Import drop0 from Matrix

arules 1.1-4 (7/25/2014)

• C code: fixed problem in error message generation in apriori and eclat (this fixes the trio library problem under Windows)
• C code: rapriori uses now STRING_ELT to be compatible with TERR (TIBCO)
• C code: removed some unused variables.

arules 1.1-3 (6/17/2014)

• Fixed dependency on XML and pmml
• the interest measure chi-squared does now also report p-values (with significance=TRUE)
• interestMeasure calculation checks now better for missing transactions
• interestMeasure consistently returns now NA if not defined for a certain rule

arules 1.1-2 (2/21/2014)

• discretize gained the parameter ordered.
• itemwise set operations itemUnion, itemSetdiff and itemIntersect added.
• validObject checks now rules more thoroughly
• aggregate removes duplicate items from the lhs

arules 1.1-1 (1/16/2014)

• is.superset/is.subset now makes sure that the two arguments conform using recode (number and order of items)
• is.superset/is.subset returns now a matrix with appropriate dimnames
• bug fix: fixed dimname bug in as(…, “dgCMatrix”) for tidLists
• image: labels are now passed on correctly.
• tidLists has now c().

arules 1.1-0 (12/10/2013)

• bug fix: reuse in now passed on correctly in interestMeasures (bug reported by Ying Leung)
• direct coercions from and to dgCMatrix is no longer supported use ngCMatrix instead
• coercion from ngCMatrix to itemMatrix and transactions is now possible
• C code: fixed misaligned address on 64-bit systems

arules 1.0-15 (9/6/2013)

• service release

arules 1.0-14 (5/24/2013)

• discretize handles now NAs correctly
• bug fix in is.subset

arules 1.0-13 (4/7/2013)

• transactions: coercion form data.frame now handles logical automatically.
• discretize replaces categorize and offers several additional methods

arules 1.0-12 (11/28/2012)

• Added read and write for PMML.
• ‘WRITE’ is now deprecated, use ‘write’ instead
• C code: Added a copy of the C subscript code from R for better performance and compatibility with arulesSequences

arules 1.0-11 (11/19/2012)

• Fixed vignette.
• Internal Changes for dimnames and subsetting

arules 1.0-9 and 1.0-10 (9/3/2012)

• Added PACKAGE argument to C calls.
• C code: Added C routine symbols to NAMESPACE for arulesSequence

arules 1.0-8 (8/23/2012)

• fixed memory problem in eclat with tidLists=TRUE
• added supportedTransactions()
• is.subset/is.superset can not return a sparse matrix
• added support to categorize continuous variables.

arules 1.0-7 (11/4/2011)

• minor fixes (removed factor in dimnames for itemMatrix, warning in WRITE)
• read.transactions now accepts column names to specify user and item columns (by F. Leisch)

arules 1.0-0 (3/24/2009)

• Initial stable release version

arules 0.1-0 (4/15/2005)

• Alpha and beta versions

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They may not be fully stable and should be used with caution. We make no claims about them.
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