Set given indices as NA

For given indices, set those indices of an object as NA.

Usage

setNA(x, indices)

setNA(x) <- value

Arguments

x

an R object.

indices

integer vector of indices to set as NA.

value

integer vector of indices to set as NA for the replacement function.

Value

the modified object with given indices set to NA.

Details

This function is a S3 generic. The default method sets indices to NA using [<-, passing the indices first to arrayInd if the input has a non-NULL dim attribute.

The setNA<- function is meant to be a direct replacement for is.na<- with (in my opinion) a clearer naming convention. The base methods are implemented verbatim (for factor and numeric_version objects), whereas the default method differs by using arrayInd (see above), whereas is.na<- is implemented just as x[value] <- NA.

Note

Complex inputs will have indices set to NA_complex_, meaning that both the real and imaginary parts will be set to NA, not just the real part which can happen (depending on R version) with x_complex[indices] <- NA.

See also

is.na<-, whichNA

Examples

setNA(1:5, c(1, 4))
#> [1] NA  2  3 NA  5
setNA(c("hi", "hello", "bye", "goodbye"), c(1, 4))
#> [1] NA      "hello" "bye"   NA     
setNA(matrix(1:4, 2, 2), c(1, 4))
#>      [,1] [,2]
#> [1,]   NA    3
#> [2,]    2   NA
setNA(list(1, 2, 3, list(1, 2)), c(1, 4))
#> [[1]]
#> [1] NA
#> 
#> [[2]]
#> [1] 2
#> 
#> [[3]]
#> [1] 3
#> 
#> [[4]]
#> [1] NA
#> 

x <- 1:10
setNA(x) <- c(1, 7, 9)
x
#>  [1] NA  2  3  4  5  6 NA  8 NA 10