Maximum likelihood estimates

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125 document x for different settings of a pair of variables xi,xj i ...and similarly for the other three settings of xi and xj i ...This shows how simple the non linear weighting function really is ...Estimation of parameters The use of a weighting function of the kind derived above in actual retrieval requires the estimation of pertinent parameters ...Here I have adopted a labelling scheme for the cells in which [x]means the number of occurrences in the cell labelled x ...
131 When computing I xi,xj for the purpose of constructing an MST we need only to know the rank ordering of the I xi,xj s ...then I xi,xj will be strictly monotone with This is an extremely simple formulation of EMIM and easy to compute ...The problem of what to do with zero entries in one of the cells 1 to 4 is taken care of by letting 0 log 0 0 ...Next we discuss the possibility of approximation ...d xi,xj P xi 1,xj 1 P xi 1 P xj 1 to measure the deviation from independence for any two index terms i and j ...