Check if preference order for a one-sided market is complete
roommate.checkPreferences(pref)a matrix with preference orderings with proper C++ indices or NULL if the preference order is not complete.
is a matrix with the preference order of each individual in the
market. This argument is only required when utils is not provided.
If there are n individuals, then this matrix will be of dimension
n-1 by n. The i,jth element refers to j's
ith most favorite partner. Preference orders can either be specified
using R-indexing (starting at 1) or C++ indexing (starting at 0). The
matrix pref must be of dimension n-1 by n. Otherwise,
the function will throw an error.