zap_missing: Zap special missings to regular R missings

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Zap special missings to regular R missings

Description

This is useful if you want to convert tagged missing values from SAS or Stata, or user-defined missings from SPSS, to regular R NA.

Usage

zap_missing(x)

Arguments

x	A vector or data frame

Examples

x1 <- labelled(
  c(1, 5, tagged_na("a", "b")),
  c(Unknown = tagged_na("a"), Refused = tagged_na("b"))
)
x1
zap_missing(x1)

x2 <- labelled_spss(
  c(1, 2, 1, 99),
  c(missing = 99),
  na_value = 99
)
x2
zap_missing(x2)

# You can also apply to data frames
df <- tibble::tibble(x1, x2, y = 4:1)
df
zap_missing(df)

haven documentation built on June 8, 2025, 11:14 a.m.