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    Search Algorithms: FCI
    



    
    
        
            Search Algorithms: WGFCI
        
    
    

 WFGES ("Whimsical Fast Greedy Equivalence Search") is an experimental algorithm for the mixed variable case.
    Each discrete variable is rewritten as a set of indicator variables, and then FGES (see) is run
    over the indicators and continuous variables. A causal connection is inferred between X and Y if
    X and Y are connected and continuous, or if there is a connection between one of the indicators
    of the X or of Y to an indicator of the other, or to a continuous variable, if X or Y is
    continuous. Unanimous directions are inferred.

Note: Zhang (2006) supplies an orientation rule set for FCI that is both arrow-complete and tail-complete; this
    is not currently implemented.