Type check variables

This function checks the type of variables in a safeframe against accepted classes. Only checks the type of provided variables and ignores those not provided.

Usage

validate_types(x, ...)

Arguments

x

a safeframe object

...

<dynamic-dots> A named list with variable names in x as list names and the related types as list values.

Value

A named list.

See also

• validate_labels() to perform a series of checks on variables

• validate_safeframe() to combine validate_labels and validate_types

Examples

x <- make_safeframe(cars,
  speed = "Miles per hour",
  dist = "Distance in miles"
)
x
#> 
#> // safeframe object
#>    speed dist
#> 1      4    2
#> 2      4   10
#> 3      7    4
#> 4      7   22
#> 5      8   16
#> 6      9   10
#> 7     10   18
#> 8     10   26
#> 9     10   34
#> 10    11   17
#> 11    11   28
#> 12    12   14
#> 13    12   20
#> 14    12   24
#> 15    12   28
#> 16    13   26
#> 17    13   34
#> 18    13   34
#> 19    13   46
#> 20    14   26
#> 21    14   36
#> 22    14   60
#> 23    14   80
#> 24    15   20
#> 25    15   26
#> 26    15   54
#> 27    16   32
#> 28    16   40
#> 29    17   32
#> 30    17   40
#> 31    17   50
#> 32    18   42
#> 33    18   56
#> 34    18   76
#> 35    18   84
#> 36    19   36
#> 37    19   46
#> 38    19   68
#> 39    20   32
#> 40    20   48
#> 41    20   52
#> 42    20   56
#> 43    20   64
#> 44    22   66
#> 45    23   54
#> 46    24   70
#> 47    24   92
#> 48    24   93
#> 49    24  120
#> 50    25   85
#> 
#> labelled variables:
#>  speed - Miles per hour
#>  dist - Distance in miles 

## the below would issue an error
## note: tryCatch is only used to avoid a genuine error in the example
tryCatch(validate_types(x), error = paste)
#> [1] "Error in validate_types(x): Assertion on 'types' failed: Must have length >= 1, but has length 0.\n"

## to allow other types, e.g. gender to be integer, character or factor
validate_types(x, speed = "numeric", dist = c(
  "integer",
  "character", "numeric"
))
#> 
#> // safeframe object
#>    speed dist
#> 1      4    2
#> 2      4   10
#> 3      7    4
#> 4      7   22
#> 5      8   16
#> 6      9   10
#> 7     10   18
#> 8     10   26
#> 9     10   34
#> 10    11   17
#> 11    11   28
#> 12    12   14
#> 13    12   20
#> 14    12   24
#> 15    12   28
#> 16    13   26
#> 17    13   34
#> 18    13   34
#> 19    13   46
#> 20    14   26
#> 21    14   36
#> 22    14   60
#> 23    14   80
#> 24    15   20
#> 25    15   26
#> 26    15   54
#> 27    16   32
#> 28    16   40
#> 29    17   32
#> 30    17   40
#> 31    17   50
#> 32    18   42
#> 33    18   56
#> 34    18   76
#> 35    18   84
#> 36    19   36
#> 37    19   46
#> 38    19   68
#> 39    20   32
#> 40    20   48
#> 41    20   52
#> 42    20   56
#> 43    20   64
#> 44    22   66
#> 45    23   54
#> 46    24   70
#> 47    24   92
#> 48    24   93
#> 49    24  120
#> 50    25   85
#> 
#> labelled variables:
#>  speed - Miles per hour
#>  dist - Distance in miles