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naniar

replace_with_na_at

Replace specified variables with NA where a certain condition is met

Description

Replace specified variables with NA where a certain condition is met

Usage

replace_with_na_at(data, .vars, condition)

Arguments

data

dataframe
.vars

A character string of variables to replace with NA values
condition

A condition required to be TRUE to set NA. Here, the condition is specified with a formula, following the syntax: ~.x {condition}. For example, writing ~.x < 20 would mean "where a variable value is less than 20, replace with NA".

Value

a dataframe

Examples

dat_ms <- tibble::tribble(~x,  ~y,    ~z,
                          1,   "A",   -100,
                          3,   "N/A", -99,
                          NA,  NA,    -98,
                          -99, "E",   -101,
                          -98, "F",   -1)

dat_ms

replace_with_na_at(data = dat_ms,
                 .vars = "x",
                 condition = ~.x == -99)

replace_with_na_at(data = dat_ms,
                 .vars = c("x","z"),
                 condition = ~.x == -99)

# replace using values in common_na_strings
replace_with_na_at(data = dat_ms,
                 .vars = c("x","z"),
                 condition = ~.x %in% common_na_strings)
naniar

Data Structures, Summaries, and Visualisations for Missing Data

v0.6.0
MIT + file LICENSE
Authors
Nicholas Tierney [aut, cre] (<https://orcid.org/0000-0003-1460-8722>), Di Cook [aut] (<https://orcid.org/0000-0002-3813-7155>), Miles McBain [aut] (<https://orcid.org/0000-0003-2865-2548>), Colin Fay [aut] (<https://orcid.org/0000-0001-7343-1846>), Mitchell O'Hara-Wild [ctb], Jim Hester [ctb], Luke Smith [ctb]
Initial release

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