na.unreplace: na.unreplace
In na.tools: Comprehensive Library for Working with Missing (NA) Values in Vectors

Description Usage Arguments Details See Also Examples

Change values to NAs, ie make explicit NAs back to NA

na.unreplace(x, values)

## Default S3 method:
na.unreplace(x, values = NULL)

## S3 method for class 'character'
na.unreplace(x, values = c("NA", NA_explicit_))

## S3 method for class 'factor'
na.unreplace(x, values = c("NA", NA_explicit_))

na.implicit(x, values)

`x`	object
`values`	values that are (or can be coerced to) `class(x)` that are to be set to `NA`.

na.unreplace replaces values by NA. It is meant to be nearly inverse operation to na_replace (and na_explicit). It can be used on both atomic and recursive objects. Unlike na.replace however, values express the values that if matched are set to NA. It is basically:

x[ x

na.unreplace is a S3 method that can be used to defince additional methods for other objects.

na.replace()

 na.unreplace( c(1,2,3,4), 3 )
 na.unreplace( c("A", "(NA)", "B", "C") )
 na.unreplace( c("A", NA_explicit_, "B", "C") )
 
 df <- data.frame( char=c('A', 'NA', 'C', NA_explicit_), num=1:4 ) 
 na.unreplace(df)