type TrigramAssocMeasures

source code

        object --+    
                 |    
NgramAssocMeasures --+
                     |
                    TrigramAssocMeasures

A collection of trigram association measures. Each association measure
is provided as a function with four arguments:
    trigram_score_fn(n_iii,
                     (n_iix, n_ixi, n_xii),
                     (n_ixx, n_xix, n_xxi),
                     n_xxx)
The arguments constitute the marginals of a contingency table, counting
the occurrences of particular events in a corpus. The letter i in the
suffix refers to the appearance of the word in question, while x indicates
the appearance of any word. Thus, for example:
n_iii counts (w1, w2, w3), i.e. the trigram being scored
n_ixx counts (w1, *, *)
n_xxx counts (*, *, *), i.e. any trigram