Tests and assertions to perform frequent argument checks. A
    substantial part of the package was written in C to minimize any worries
    about execution time overhead.

c(
    person("Michel", "Lang", NULL, "michellang@gmail.com", role = c("cre", "aut")),
    person("Bernd", "Bischl", NULL, "bernd_bischl@gmx.de", role = "ctb")
    )

R6, bit, fastmatch, data.table (>= 1.9.8), devtools, ggplot2,
knitr, magrittr, microbenchmark, rmarkdown, testthat (>=
0.11.0), tibble

'AssertCollection.R' 'allMissing.R' 'anyInfinite.R'
'anyMissing.R' 'anyNaN.R' 'asInteger.R' 'assert.R' 'helper.R'
'makeExpectation.R' 'makeTest.R' 'makeAssertion.R'
'checkAccess.R' 'checkArray.R' 'checkAtomic.R'
'checkAtomicVector.R' 'checkBit.R' 'checkCharacter.R'
'checkChoice.R' 'checkClass.R' 'checkComplex.R' 'checkCount.R'
'checkDataFrame.R' 'checkDataTable.R' 'checkDate.R'
'checkDirectoryExists.R' 'checkEnvironment.R' 'checkFALSE.R'
'checkFactor.R' 'checkFileExists.R' 'checkFlag.R'
'checkFunction.R' 'checkInt.R' 'checkInteger.R'
'checkIntegerish.R' 'checkList.R' 'checkLogical.R'
'checkMatrix.R' 'checkNamed.R' 'checkNames.R' 'checkNull.R'
'checkNumber.R' 'checkNumeric.R' 'checkOS.R' 'checkPOSIXct.R'
'checkPathForOutput.R' 'checkR6.R' 'checkScalar.R'
'checkScalarNA.R' 'checkSetEqual.R' 'checkString.R'
'checkSubset.R' 'checkTRUE.R' 'checkTibble.R' 'checkVector.R'
'coalesce.R' 'isIntegerish.R' 'matchArg.R' 'qassert.R'
'qassertr.R' 'vname.R' 'wfwl.R' 'zzz.R'

Michel Lang [cre, aut],
  Bernd Bischl [ctb]

A collection of pre-processing functions

A library of core preprocessing routines.

normalize.quantiles.R quantile_extensions.R
rma.background.correct.R rcModel.R colSummarize.R
subColSummarize.R plmr.R plmd.R

Douglas M. Bates <bates@stat.wisc.edu> and
 William N. Venables <Bill.Venables@csiro.au>

Regression spline functions and classes.

Simple, Consistent Wrappers for Common String Operations

c(
    person("Hadley", "Wickham", , "hadley@rstudio.com", c("aut", "cre", "cph")),
    person("RStudio", role = c("cph", "fnd"))
    )