is_absent function

Is value absent

Returns true if a value is either NULL, NA or "". In the case of a vector all values must be NULL/NA/"" for x to be regarded as absent.

is_absent(x, na = TRUE, blank = TRUE)

Arguments

• x: a value to check if it is absent or not
• na: do NAs count as absent
• blank: do blanks i.e. "" count as absent