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Changelog

Source: NEWS.md

sdcTable 0.34.0

CRAN release: 2026-05-09

  • New parallel processing support:
    • attack() now features an n_workers argument, enabling parallel execution of attacker problems via the future.apply package (if available).
  • protectTable() enhancements:
    • The function now exposes n_workers when using method = "SIMPLEHEURISTIC", allowing parallelized internal attacker calls (passed through to attack()).
    • Added argument attack_threshold for method = "SIMPLEHEURISTIC". This allows users to define the safety tolerance (as abs(upper - lower) > attack_threshold) directly when protecting tables.
  • Documentation updates: Added detailed explanations and performance warnings regarding RAM usage for parallel processing in the package vignette and function man-pages.
  • Added a threshold argument to attack() for more flexible safety checks (defaults to 1e-8).
  • Optimized internal create_m_matrix() for faster matrix construction and lower memory overhead.
  • Refactored/Simplified internal parameter-generation
  • Added a centralized Cell Status Codes section to sdcProblem documentation, explaining states like "z" (empty cells) and "w". This section is now reused across all functions that modify cell statuses (UserIssue #319)
  • Significantly optimized contributing_indices() regarding running-time and memory usage

sdcTable 0.33.0

CRAN release: 2025-06-26

  • Use highs instead of Rglpk and glpkAPI for LP-Solving as package was removed from CRAN

sdcTable 0.32.7

CRAN release: 2025-03-11

sdcTable 0.32.6

CRAN release: 2023-08-11

  • Improvements in SIMPLEHEURISTIC when adding additional suppressions
  • Add RegSDC as suggested package in order to avoid a CRAN note
  • Skip Unit-Tests for CRAN only

sdcTable 0.32.5

CRAN release: 2023-05-19

  • Fix singleton-detection procedure in case of existing “dummy-cells” (code "w")

sdcTable 0.32.4

CRAN release: 2022-09-22

  • Update dependency on Matrix package

sdcTable 0.32.3

CRAN release: 2022-07-16

  • Make SSBtools::GaussSuppression as method = "GAUSS" available in protectTable()
  • Update of package vignette
  • Small overall fixes
  • Fix creation of tau-Argus batchfiles (typ = "microdata") in case aggregate codes are available in raw input data

sdcTable 0.32.2

CRAN release: 2021-12-03

  • when applying dominance rules, empty cells (with frequency 0) are never marked primary sensitive
  • do not overwrite pre-existing sensitive cells when applying a threshold rule after a dominance rule with allowZeros = FALSE
  • when computing dominance rules using sampling weights it is ensured that weights are consistently rounded

sdcTable 0.32.1

CRAN release: 2021-09-30

  • allow invocation of exact previous implementation of "SIMPLEHEURISTIC using method = "SIMPLEHEURISTIC_OLD" in protectTable()
  • fix for edge-cases in "SIMPLEHEURISTIC": weights are temporarily changed for "z"-cells if no additional suppression can be detected
  • combined existing functionality to compute constraint-matrix of a problem instance into (much faster) create_m_matrix()
    • replaced internal methods/functions c_gen_mat_m() and .gen_constraint_matrix() and genMatMFull()
  • re-parametrized internal method c_make_att_prob

sdcTable 0.32.0

CRAN release: 2021-08-06

  • rewrite of the "SIMPLEHEURISTIC approach
    • is based on (full) constraint matrix written using rcpp
    • rewritten the singleton-detection procedure with rcpp
    • by default attacker-problems are checked (in a loop) for primary sensitive cells and additional supps are added until all required cells are secure (fixes also issue #136, thx Øyvind Langsrud for reporting)
    • the previous (possible unsafe but faster) implemented method can be toggled using parameter solve_attackerprobs in protectTable and protectLinkedTable
  • bugfix in internal method c_gen_mat_m with problems that have a single dimension
  • dominance rules:
    • bugfix when computing rules on weighted data
    • allow nk-dominance rules with n=1 (thx @MaximeBeaute for reporting)
    • increased performance as contributing-units to cells are computed only once
  • improved function attack()
    • problem-formulation and solution using the glpkAPI-package
    • can be used to attack all (suppressed) or specific cells
    • can also be used after computing a solution for the cell suppression problem
  • performance improvements
    • c_quick_suppression() and attack() compute linear deps (.gen_contraint_matrix) only once
    • improvements in computation of contributing units to a cell (contributing_indices)
  • new/updated functions/methods:
  • improved examples, documentation, test-data and unit-tests
    • improved and updated documentation getInfo() and setInfo()
    • replaced microData1.RData and microData2.RData
      • generation is reproducible in data-raw
      • data can be loaded using data(microdata1) and data(microdata2)
    • replaced problem.RData and problemWithSupps.RData with sdc_testproblem()
    • better document sdc-code z in primarySuppression()
    • improved and updated vignette (thx to @Krisselack for reporting)

sdcTable 0.31

CRAN release: 2020-03-10

  • remove debugging output
  • fixing typos in vignettes
  • bugfix in protectLinkedTables()
  • remove dependency on package lpSolveAPI
  • update singleton-detection procedure by allowing to input a threshold value that must be respected for all simple table rows
  • check dominance rules (unweighted variables are used)

sdcTable 0.30

CRAN release: 2019-09-19

  • various fixes and improvements in createJJFormat()
  • ignore sampling weights in case the input in makeProblem() is a complete table and not microdata
  • sdcProb2df(): if numeric variables are shown; display their weighted values (in case) sampling weights have been specified in makeProblem

sdcTable 0.29

CRAN release: 2019-08-31

  • change in primarySuppression(): for dominance rule it is now only possible to specify underlying variables by name (using argument numVarName) and no longer by index to avoid errors
  • fixes in primary suppression for dominance rules
  • create files from examples in tempdir()

sdcTable 0.28

CRAN release: 2019-06-04

  • new function contributing_indices()
  • call .Defunct for old exported functions
  • make default bounds (ub, lb) depend on costs
  • allow to specify numVarInd also by name via numVarName in primarySupression() for dominance rules (p, nk and pq)
  • make use of sampling weights (by replicating) values for dominance rules.
  • don’t export unused functionality
  • createJJFormat() and writeJJFormat() can be used to create text files with sdcProblems in “JJs Format”
  • allow to specify variable names too in makeProblem

sdcTable 0.27

CRAN release: 2019-02-28

sdcTable 0.26

CRAN release: 2019-01-18

  • bugfix when computing indices for contributing units used in some primary suppression methods

sdcTable 0.25

CRAN release: 2018-11-14

  • better error messages in case invalid hierarchies have been specified

sdcTable 0.24

CRAN release: 2018-07-24

  • update in SIMPLEHEURISTIC-algorithm that now really respects cells (status "z") that must not be suppressed

sdcTable 0.23

CRAN release: 2018-06-22

sdcTable 0.22.x

  • Feature to create BATCH files suitable for tau-argus