arules_1.7-0

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 the man page for weclat. The 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 a header from a connection. The first item is no longer dropped.