(defn dice-coefficient-str
"
http://en.wikipedia.org/wiki/Dice%27s_coefficient
When taken as a string similarity measure, the coefficient may be calculated for two strings, x and y using bigrams. here nt is the number of character bigrams found in both strings, nx is the number of bigrams in string x and ny is the number of bigrams in string y. For example, to calculate the similarity between:
night
nacht
We would find the set of bigrams in each word:
{ni,ig,gh,ht}
{na,ac,ch,ht}
Each set has four elements, and the intersection of these two sets has only one element: ht.
Plugging this into the formula, we calculate, s = (2 ¬? 1) / (4 + 4) = 0.25.
"
[a b]
(dice-coefficient
(bigrams a)
(bigrams b)))
Vars in
incanter.stats/dice-coefficient-str:
defn
Used in 0 other vars
Source
incanter/stats.clj:3087
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