# https://github.com/r-lib/pkgdown/issues/2704

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Check If Numeric

Source: R/utilities.R
check_if_numeric.Rd

Check if the input variable is numeric

Usage

check_if_numeric(
  x,
  allow_na = TRUE,
  arg = rlang::caller_arg(x),
  call = rlang::caller_env()
)

Arguments

x

Input variable to check if it is numeric

allow_na

Input boolean to determine if NA or NaN is allowed. Default: TRUE

arg

An argument name as a string. This argument will be mentioned in error messages as the input that is at the origin of a problem.

call

The execution environment of a currently running function, e.g. caller_env(). The function will be mentioned in error messages as the source of the error. See the call argument of abort() for more information.

Value

The variable itself or an error message if variable is not numeric

See also

caller_arg, stack cli_abort

Examples

# No error
input = 1
try(check_if_numeric(input))

# Error as "5" is not numeric
input = "5"
try(check_if_numeric(input))
#> Error in eval(expr, envir) : 
#>   Provided input `input`, must be <numeric>, `NA` or `NaN`. It is
#> currently "5" of type <character>

# Error as NULL is not numeric
input = NULL
try(check_if_numeric(input))
#> Error in eval(expr, envir) : 
#>   Provided input `input`, must be <numeric>, `NA` or `NaN`. It is
#> currently of type <NULL>

# Error as NA is not numeric and allow_na is FALSE
input = NA
try(check_if_numeric(input, allow_na = FALSE))
#> Error in eval(expr, envir) : 
#>   Provided input `input`, must be <numeric>. It is currently NA of type
#> <logical>