kalpha_denom: Compute Krippendorffs's Alpha denominator
Description
Computes the denominator in Krippendorff's Alpha formula
Usage
kalpha_denom(vum, numvals, var_level)
Arguments
numvals
Amount of unique values in codings (categories)
References
Krippendorff, K. (2011). Computing Krippendorff's Alpha-Reliability.
Retrieved from http://repository.upenn.edu/asc_papers/43