This commit is contained in:
Joshua Peek
2013-06-10 10:36:56 -05:00
parent bf4596c26d
commit 9822b153eb

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@@ -130,38 +130,38 @@ module Linguist
Math.log(@languages[language].to_f / @languages_total.to_f) Math.log(@languages[language].to_f / @languages_total.to_f)
end end
private private
def verbosity def verbosity
@verbosity ||= (ENV['LINGUIST_DEBUG']||0).to_i @verbosity ||= (ENV['LINGUIST_DEBUG']||0).to_i
end end
# Internal: show a table of probabilities for each <token,language> pair. # Internal: show a table of probabilities for each <token,language> pair.
# #
# The number in each table entry is the number of "points" that each # The number in each table entry is the number of "points" that each
# token contributes toward the belief that the file under test is a # token contributes toward the belief that the file under test is a
# particular language. Points are additive. # particular language. Points are additive.
# #
# Points are the number of times a token appears in the file, times # Points are the number of times a token appears in the file, times
# how much more likely (log of probability ratio) that token is to # how much more likely (log of probability ratio) that token is to
# appear in one language vs. the least-likely language. Dashes # appear in one language vs. the least-likely language. Dashes
# indicate the least-likely language (and zero points) for each token. # indicate the least-likely language (and zero points) for each token.
def dump_all_tokens(tokens, languages) def dump_all_tokens(tokens, languages)
maxlen = tokens.map{|tok| tok.size}.max maxlen = tokens.map{|tok| tok.size}.max
printf "%#{maxlen}s", "" printf "%#{maxlen}s", ""
puts " #" + languages.map{|lang| sprintf("%10s", lang)}.join puts " #" + languages.map{|lang| sprintf("%10s", lang)}.join
tokmap = Hash.new(0) tokmap = Hash.new(0)
tokens.each{|tok| tokmap[tok] += 1} tokens.each{|tok| tokmap[tok] += 1}
tokmap.sort.each{|tok, count| tokmap.sort.each{|tok, count|
arr = languages.map{|lang| [lang, token_probability(tok, lang)] } arr = languages.map{|lang| [lang, token_probability(tok, lang)] }
min = arr.map{|a,b| b}.min min = arr.map{|a,b| b}.min
minlog = Math.log(min) minlog = Math.log(min)
if !arr.inject(true) {|result, n| result && n[1] == arr[0][1]} # if not all the same if !arr.inject(true) {|result, n| result && n[1] == arr[0][1]} # if not all the same
printf "%#{maxlen}s%5d", tok, count printf "%#{maxlen}s%5d", tok, count
puts arr.map{|ent| puts arr.map{|ent|
ent[1] == min ? " -" : sprintf("%10.3f", count*(Math.log(ent[1])-minlog)) ent[1] == min ? " -" : sprintf("%10.3f", count*(Math.log(ent[1])-minlog))
}.join }.join
end end
} }
end end
end end
end end