idngram_merge(1) [debian man page]
IDNGRAM_MERGE(1) User Contributed Perl Documentation IDNGRAM_MERGE(1) NAME
idngram_merge - merge idngram file into one SYNOPSIS
idngram_merge [option]... idngram_file... DESCRIPTION
idngram_merge merge multiple idngram file, each of them are sorted [id1,...,idN,freq] array, into one idngram file. For those id1..idN which appear in more than one files, only one item will appear in the final file, and its freq are summed. The idngram files are original generated by ids2ngram. OPTIONS All the following options are mandatory. -n, --NMax N Specify the N-gram of source data file. -o, --out output-file Specifiy the final merged idngram file. EXAMPLE
Following example merge 2 id3gram files into a large one: B<idngram_merge -n3 -o all.id3gram first.id3gram second.id3gram> AUTHOR
Originally written by Phill.Zhang <phill.zhang@sun.com>. Currently maintained by Kov.Chai <tchaikov@gmail.com>. SEE ALSO
ids2ngram(1). perl v5.14.2 2012-06-09 IDNGRAM_MERGE(1)
Check Out this Related Man Page
SLMBUILD(1) User Contributed Perl Documentation SLMBUILD(1) NAME
slmbuild - generate language model from idngram file SYNOPSIS
slmbuild [option]... idngram_file... DESCRIPTION
slmbuild generates a back-off smoothing language model from a given idngram file. Generally, the idngram_file is created by ids2ngram. OPTIONS All the following options are mandatory. -n,--NMax N 1 for unigram, 2 for bigram, 3 for trigram. Any number not in the range of 1..3 is not valid. -o, --out output-file Specify the output xfilei name. -l, --log using -log(pr), use pr directly by default. -w, --wordcount N Lexican size, number of different words. -b, --brk id... Set the ids which should be treated as breaker. -e, --e id... Set the ids which should not be put into LM. -c, --cut c... k-grams whose freq <= c[k] are dropped. -d, --discount method, param... The k-th -d parm specifies the discount method For k-gram, possibble values for method/param are: B<GT>,I<R>,I<dis> : B<GT> discount for r E<lt>= I<R>, r is the freq of a ngram. Linear discount for those r E<gt> I<R>, i.e. r'=r*dis 0 E<lt>E<lt> dis E<lt> 1.0, for example 0.999 B<ABS>,[I<dis>] : Absolute discount r'=r-I<dis>. And I<dis> is optional 0 E<lt>E<lt> I<dis> E<lt> cut[k]+1.0, normally I<dis> E<lt> 1.0. LIN,[I<dis>] : Linear discount r'=r*dis. And dis is optional 0 E<lt> dis E<lt> 1.0 NOTE
-n must be given before -c -b. And -c must give right number of cut-off, also -ds must appear exactly N times specifying the discounts for 1-gram, 2-gram..., respectively. BREAKER-IDs could be SentenceTokens or ParagraphTokens. Conceptually, these ids have no meaning when they appeared in the middle of n-gram. EXCLUDE-IDs could be ambiguious-ids. Conceptually, n-grams which contain those ids are meaningless. We can not erase ngrams according to BREAKER-IDS and EXCLUDE-IDs directly from IDNGRAM file, because some low-level information is still useful in it. EXAMPLE
Following example read 'all.id3gram' and write trigram model 'all.slm'. At 1-gram level, use Good-Turing discount with cut-off 0, i<R>=8, dis=0.9995. At 2-gram level, use Absolute discount with cut-off 3, dis auto-calc. At 3-gram level, use Absolute discount with cut-off 2, dis auto-calc. Word id 10,11,12 are breakers (sentence/para/paper breaker, etc). Exclude-ID is 9. Lexicon contains 200000 words. The result languagme model uses -log(pr). slmbuild -l -n 3 -o all.slm -w 200000 -c 0,3,2 -d GT,8,0.9995 -d ABS -d ABS -b 10,11,12 -e 9 all.id3gram AUTHOR
Originally written by Phill.Zhang <phill.zhang@sun.com>. Currently maintained by Kov.Chai <tchaikov@gmail.com>. SEE ALSO
ids2ngram(1), slmprune(1). perl v5.14.2 2012-06-09 SLMBUILD(1)