Ensure that a vector has only a single value throughout.

Missing values are replaced with the single value, and if all values are missing, the first value in missing is used throughout.

Usage

single_value(x, missing = NA, info = NULL)

Arguments

x

The vector which should have a single value

missing

The vector of values to consider missing in x

info

If more than one value is found, append this to the warning or error to assist with determining the location of the issue.

Value

x as the scalar single value found throughout (or an error if more than one value is found).

Examples

single_value(c(NA, 1))
#> [1] 1