Remove NULL values variables from a list

Unlike vectors, lists can hold objects with value NULL. This gets rid of them.

Usage

removeNULL(aList)

Arguments

aList

A list

Value

Same list with NULL's removed

Details

This version is NOT recursive

plyr::rbind.fill uses an experimental function that I choose to avoid. This is the "safe" version.

Author

Paul Johnson

Examples

## Note it is non-recursive, NULL remains in e
x <- list(a = rnorm(5), b = NULL, c = rnorm(5), d = NULL,
     e = list(f = rnorm(2), g = NULL))
x
#> $a
#> [1] -0.21951028  0.07162039 -0.38779843  0.75864023 -1.20937260
#> 
#> $b
#> NULL
#> 
#> $c
#> [1] -0.9351637  0.7008320  1.3981987 -2.2991663  1.3683319
#> 
#> $d
#> NULL
#> 
#> $e
#> $e$f
#> [1] -0.5132260 -0.3815087
#> 
#> $e$g
#> NULL
#> 
#> 
removeNULL(x)
#> $a
#> [1] -0.21951028  0.07162039 -0.38779843  0.75864023 -1.20937260
#> 
#> $c
#> [1] -0.9351637  0.7008320  1.3981987 -2.2991663  1.3683319
#> 
#> $e
#> $e$f
#> [1] -0.5132260 -0.3815087
#> 
#> $e$g
#> NULL
#> 
#>