rules.md
In dunlin: Preprocessing Tools for Clinical Trial Data

rule printed correctly

Code
  rule(a = "1", b = NA)
Output
  Mapping of:
  a  <-  "1" 
  b  <-  <NA> 
  Convert to <NA>: "" 
  Convert to factor: TRUE 
  Drop unused level: FALSE 
  NA-replacing level in last position: TRUE

rule with multiple matching printed correctly

Code
  rule(a = "1", b = c(NA, "b"), x = c("first", "second"), .to_NA = c("",
    "missing"))
Output
  Mapping of:
  a  <-  "1" 
  b  <-  <NA>, "b" 
  x  <-  "first", "second" 
  Convert to <NA>: "", "missing" 
  Convert to factor: TRUE 
  Drop unused level: FALSE 
  NA-replacing level in last position: TRUE