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Replace Empty String

Source: R/AllGenerics.R, R/replace.R
replace_empty.Rd

Replaces empty strings.

Usage

replace_empty(x, ...)

# S4 method for class 'matrix'
replace_empty(x, value)

# S4 method for class 'data.frame'
replace_empty(x, value)

Arguments

x

An R object (should be a matrix or a data.frame).

...

Currently not used.

value

A possible replacement value.

See also

Other data cleaning tools: clean_whitespace(), remove_Inf(), remove_NA(), remove_constant(), remove_empty(), remove_zero(), replace_Inf(), replace_NA(), replace_zero()

Author

N. Frerebeau

Examples

## Create a data matrix
X <- matrix(sample(LETTERS, 25, TRUE), nrow = 5, ncol = 5)

## Add empty string
k <- sample(1:25, 3, FALSE)
X[k] <- ""
X
#>      [,1] [,2] [,3] [,4] [,5]
#> [1,] "J"  "B"  "U"  "D"  "M" 
#> [2,] "S"  ""   "T"  "A"  "H" 
#> [3,] "B"  ""   "A"  "Q"  ""  
#> [4,] "D"  "Z"  "Q"  "B"  "L" 
#> [5,] "L"  "G"  "F"  "V"  "A" 

## Remove rows with empty strings
remove_empty(X, margin = 1)
#>      [,1] [,2] [,3] [,4] [,5]
#> [1,] "J"  "B"  "U"  "D"  "M" 
#> [2,] "D"  "Z"  "Q"  "B"  "L" 
#> [3,] "L"  "G"  "F"  "V"  "A" 

## Replace empty strings
replace_empty(X, value = "XXX")
#>      [,1] [,2]  [,3] [,4] [,5] 
#> [1,] "J"  "B"   "U"  "D"  "M"  
#> [2,] "S"  "XXX" "T"  "A"  "H"  
#> [3,] "B"  "XXX" "A"  "Q"  "XXX"
#> [4,] "D"  "Z"   "Q"  "B"  "L"  
#> [5,] "L"  "G"   "F"  "V"  "A"