IsDichotomous: Test If a Variable Contains Only Two Unique Values
Description
Test if a variable contains only two values, and maybe NAs. The variable does not need to be a numerical value, factors and logicals are supported as well.
Usage
IsDichotomous(x)
Arguments
x
a numeric or integer vector, a logical vector or a factor (ordered and unordered)
Value
TRUE if x contains only two unique values, FALSE else