Check whether an object is a valid numeric scalar

This function tests whether the input is a valid numeric scalar: not NULL, not NA, not non-finite, and of length one. It first checks for invalid inputs using is_invalid(), then verifies that the value is numeric, of length one, and finite.

Usage

is_numeric_scalar(x)

Arguments

x

An object to test.

Value

TRUE if x is a valid numeric scalar; otherwise FALSE.

Examples

is_numeric_scalar(1)       # TRUE
#> [1] TRUE
is_numeric_scalar(3.14)    # TRUE
#> [1] TRUE
is_numeric_scalar(NA)      # FALSE
#> [1] FALSE
is_numeric_scalar(NULL)    # FALSE
#> [1] FALSE
is_numeric_scalar(c(1, 2)) # FALSE
#> [1] FALSE
is_numeric_scalar(Inf)     # FALSE
#> [1] FALSE