mice 3.15.0

mice 3.15.0

Major changes

• Adds a function futuremice() with support for parallel imputation using the future package (#504). Contributed @thomvolker, @gerkovink

• Adds multivariate predictive mean matching mice.impute.mpmm(). (#460). Contributed @Mingyang-Cai

• Adds convergence() for convergence evaluation (#484). Contributed @hanneoberman

• Reverts the internal seed behaviour back to mice 3.13.10 (#515). #432 introduced new local seed in response to #426. However, various issues arose with this facility (#459, #492, #502, #505). This version restores the old behaviour using global .Random.seed. Contributed @gerkovink

• Adds a custom.t argument to pool() that allows the advanced user to specify a custom rule for calculating the total variance $T$. Contributed @gerkovink

• Adds new argument exclude to mice.impute.pmm() that excludes a user-specified vector of values from matching. Excluded values will not appear in the imputations. Since the observed values are not imputed, the user-specified values are still being used to fit the imputation model (#392, #519). Contributed @gerkovink

Minor changes

• Styles all .R and .Rmd files
• Makes post-processing assignment consistent with lines 85/86 in sampler.R (#511)
• Edit test broken on R<4 (#501). Contributed @MichaelChirico
• Adds support for models reporting contrasts rather than terms (#498). Contributed @LukasWallrich
• Applies edits to autocorrelation function (#491). Contributed @hanneoberman
• Changes p-value calculation to more robust alternative (#494). Contributed @AndrewLawrence
• Uses inherits() to check on class membership
• Adds decprecation notices to parlmice()
• Adapt prop, patterns and weights matrices for pattern with only 1's
• Adds warning when patterns cannot be generated (#449, #317, #451)
• Adds warning on the order of model terms in D1() and D2() (#420)
• Adds example code to fit model on train data and apply to test data to mice()
• Adds example code on synthetic data generation and analysis in make.where()
• Adds testfile test-mice.impute.rf.R(#448)

Bug fixes

• Replaces .Random.seed reads from the .GlobalEnv by get(".Random.seed", envir = globalenv(), mode = "integer", inherits = FALSE)
• Repairs capitalisation problems with lastSeedValue variable name
• Solves x$lastSeedValue problem in cbind.mids() (#502)
• Fixes problems with ampute()
• Preserves stochastic nature of mice() by smarter random seed initialisation (#459)
• Repairs a drop = FALSE buglet in mice.impute.rf() (#447, #448)
• @str-amg reported that the new dependency on withr package should have version 2.4.0 (published in January 2021) or higher. Versions withr 2.3.0 and before may give Error: object 'local_seed' is not exported by 'namespace:withr'. Either update manually, or install the patched version mice 3.14.1 from GitHub. (#445). NOTE: withr is no longer needed in mice 3.15.0