R/is_empty.R
empty_cols.Rd
These functions check which rows or columns of a data frame completely contain missing values, i.e. which observations or variables completely have missing values, and either 1) returns their indices; or 2) removes them from the data frame.
empty_cols(x) empty_rows(x) remove_empty_cols(x) remove_empty_rows(x)
x | A data frame. |
---|
For empty_cols
and empty_rows
, a numeric (named) vector
with row or column indices of those variables that completely have
missing values.
For remove_empty_cols
and remove_empty_rows
, a
data frame with "empty" columns or rows removed.
tmp <- data.frame(a = c(1, 2, 3, NA, 5), b = c(1, NA, 3, NA , 5), c = c(NA, NA, NA, NA, NA), d = c(1, NA, 3, NA, 5)) tmp#> a b c d #> 1 1 1 NA 1 #> 2 2 NA NA NA #> 3 3 3 NA 3 #> 4 NA NA NA NA #> 5 5 5 NA 5empty_cols(tmp)#> c #> 3empty_rows(tmp)#> [1] 4remove_empty_cols(tmp)#> a b d #> 1 1 1 1 #> 2 2 NA NA #> 3 3 3 3 #> 4 NA NA NA #> 5 5 5 5remove_empty_rows(tmp)#> a b c d #> 1 1 1 NA 1 #> 2 2 NA NA NA #> 3 3 3 NA 3 #> 4 5 5 NA 5