Tests the levels of x contain any instances of "Don't know". If so, replaces these levels with NA
removeDK(x, dk = "Don't Know")
Character vector or factor
Character vector, containing search terms, e.g. c("Don't know", "Don't Know")
A factor with "Dont know" removed
Other Functions to clean data: encToInt
,
fixCommonEncodingProblems
,
fixLevels01R
,
fixLevels01SPSS
, fixLevels01
,
hasDK
, intToEnc
,
leveltestR
, leveltestSPSS
,
removeAllDK