simPC: Utility function to simulate paired comparison or rankings data
Description
The function generates a random paired comparison data matrix (two response categories, no undecided) or a rankings data matrix optionally based on user specified worth parameters.
If NULL, values are drawn from uniform distribution (interval from 0 to 1), otherwise the user may specify arbitrary values.
In both cases, the values are transformed into [0, 1] and scaled to sum up to 1.