Changes between Version 2 and Version 3 of languagefilter


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Timestamp:
04/25/20 09:46:12 (6 years ago)
Author:
admin
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  • languagefilter

    v2 v3  
    1414* Frequency wordlists from big web corpora for more than 40 languages are included with the script.
    1515* The size of wordlists included with the script is limited. User produced unlimited wordlists can be used to improve the performance, esp. in the case of very similar languages.
    16 * It is important to [Unitok tokenise] all wordlists (used in a single run of the filter) the same way.
     16* It is important to [[Unitok|tokenise]] all wordlists (used in a single run of the filter) the same way.
    1717
    1818== Examples ==
    … …  
    8484== Usage ==
    8585{{{
    86 ./lang_filter.py (LANGUAGE FRQ_WORDLIST[.gz|.xz])+ ACCEPTED_LANGS REJECTED_OUT LANG_RATIO_THRESHOLD
     86./lang_filter.py (LANGUAGE FRQ_WORDLIST[.gz|.xz])+ ACCEPTED_LANGS REJECTED_OUT LANG_RATIO_THR
    8787
    8888E.g. to see all score information in a single output file:
    … …  
    103103ACCEPTED_LANGS comma separated list of accepted languages (ALL to accept all)
    104104
    105 REJECTED_OUT a path to write rejected data to; three files with the following suffixes are created:
     105REJECTED_OUT a path to write rejected data to; files with the following suffixes are created:
    106106    "lang"  ... rejected since the content is in an unwanted recognised language
    107107    "mixed" ... rejected since the content is below the threshold of discerning languages
    … …  
    109109    "small" ... rejected since the content is too short to reliably determine its language
    110110
    111 LANG_RATIO_THRESHOLD threshold ratio of wordlist scores of top/second most scoring languages
     111LANG_RATIO_THR threshold ratio of wordlist scores of top/second most scoring languages
    112112    (NONE not to filter mixed language at all)
    113113    1.1 is ok for different languages, 1.01 is better for very close languages
    … …  
    119119    Attribute doc.lang_scores -- scores for each recognised language
    120120    Structure par_langs with attributes lang and lang_scores -- the same for paragraphs
    121     New token attributes (columns): scores for all recognised languages (in the command line order)
     121    New token attributes (columns): scores for recognised languages (command line order)
    122122
    123123A word form is expected in the first column of the input.
    … …  
    128128== To build your own frequency wordlist ==
    129129{{{
    130 #Get corpus frequencies of lowercased words from a corpus compiled by [https://nlp.fi.muni.cz/trac/noske Sketch Engine]
     130#Get corpus frequencies of lowercased words from a corpus compiled by Sketch Engine
    131131lsclex -f /corpora/registry/english_web_corpus lc | cut -f2,3 | ./uninorm_4.py | perl -pe 's, (\d+)$,\t$1,' > en.wl1
    132132lsclex -f /corpora/registry/czech_web_corpus   lc | cut -f2,3 | ./uninorm_4.py | perl -pe 's, (\d+)$,\t$1,' > cs.wl1
    … …  
    138138cut -f1 slovak_web_corpus.vert  | grep -v '^<' | tr '[:upper:]' '[:lower:]' | sort | uniq -c | perl -pe 's,^\s*(\d+) (.*)$,$2\t$1,' > sk.wl1
    139139
    140 #Filter the wordlist -- allow just characters valid for the language and a reasonable word length
     140#Allow words with characters occurring in the language and a reasonable length
    141141grep '[abcdefghijklmnopqrstuvwxyz]' en.wl1                  | grep -v -P "['.-]{2}" | ./wl_grep.py "[#@]?[abcdefghijklmnopqrstuvwxyzéè0-9'][abcdefghijklmnopqrstuvwxyzéè0-9'.-]{0,29}"                               > en.wl2
    142142grep '[aábcčdďeéěfghiíjklmnňoópqrřsštťuúůvwxyýzž]' cs.wl1   | grep -v -P "['.-]{2}" | ./wl_grep.py "[#@]?[aábcčdďeéěfghiíjklmnňoópqrřsštťuúůvwxyýzž0-9'][aábcčdďeéěfghiíjklmnňoópqrřsštťuúůvwxyýzž0-9'.-]{0,29}"     > cs.wl2