drop_na
drops entries by specified columns.
delete_na
deletes rows or columns with too many NAs.
drop_na(.data, ...) delete_na(.data, MARGIN, n)
.data | A data.table |
---|---|
... | Colunms to be dropped or deleted. |
MARGIN | 1 or 2. 1 for deleting rows, 2 for deleting columns. |
n | If number (proportion) of NAs is larger than or equal to "n", the columns/rows would be deleted. When smaller than 1, use as proportion. When larger or equal to 1, use as number. |
A data.table
#> x y z #> <num> <num> <lgcl> #> 1: 1 NA NA #> 2: 2 NA NA #> 3: NA 4 NA #> 4: 3 5 NAx %>% delete_na(2,0.75)#> x y #> <num> <num> #> 1: 1 NA #> 2: 2 NA #> 3: NA 4 #> 4: 3 5#> x #> <num> #> 1: 1 #> 2: 2 #> 3: NA #> 4: 3#> Null data.table (0 rows and 0 cols)#> x #> <num> #> 1: 1 #> 2: 2 #> 3: NA #> 4: 3#> x y z #> <num> <num> <lgcl> #> 1: 3 5 NA#> x y z #> <num> <num> <lgcl> #> 1: 3 5 NA