diff options
Diffstat (limited to 'src/training/estimate_interpolation.cpp')
| -rw-r--r-- | src/training/estimate_interpolation.cpp | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/src/training/estimate_interpolation.cpp b/src/training/estimate_interpolation.cpp deleted file mode 100644 index aaae17b..0000000 --- a/src/training/estimate_interpolation.cpp +++ /dev/null @@ -1,146 +0,0 @@ -/* - * libpinyin - * Library to deal with pinyin. - * - * Copyright (C) 2006-2008 Peng Wu - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <locale.h> -#include <math.h> -#include <glib.h> -#include "memory_chunk.h" -#include "novel_types.h" -#include "phrase_index.h" -#include "ngram.h" - -parameter_t compute_interpolation(SingleGram * deleted_bigram, - FacadePhraseIndex * unigram, - SingleGram * bigram){ - bool success; - parameter_t lambda = 0, next_lambda = 0.6; - parameter_t epsilon = 0.001; - - while ( fabs(lambda - next_lambda) > epsilon){ - lambda = next_lambda; - next_lambda = 0; - guint32 table_num = 0; - parameter_t numerator = 0; - parameter_t part_of_denominator = 0; - - BigramPhraseWithCountArray array = g_array_new(FALSE, FALSE, sizeof(BigramPhraseItemWithCount)); - deleted_bigram->retrieve_all(array); - - for ( int i = 0; i < array->len; ++i){ - BigramPhraseItemWithCount* item = &g_array_index(array, BigramPhraseItemWithCount, i); - //get the phrase token - phrase_token_t token = item->m_token; - guint32 deleted_freq = item->m_count; - - { - guint32 freq = 0; - parameter_t elem_poss = 0; - if ( bigram && bigram->get_freq(token, freq)){ - guint32 total_freq; - assert(bigram->get_total_freq(total_freq)); - assert(0 != total_freq); - elem_poss = freq / (parameter_t) total_freq; - } - numerator = lambda * elem_poss; - } - - { - guint32 freq = 0; - parameter_t elem_poss = 0; - PhraseItem item; - if (!unigram->get_phrase_item(token, item)){ - guint32 freq = item.get_unigram_frequency(); - guint32 total_freq = unigram->get_phrase_index_total_freq(); - elem_poss = freq / (parameter_t)total_freq; - } - part_of_denominator = ( 1 - lambda) * elem_poss; - } - - if ( 0 == (numerator + part_of_denominator)) - continue; - - next_lambda += deleted_freq * (numerator / (numerator + part_of_denominator)); - } - assert(deleted_bigram->get_total_freq(table_num)); - next_lambda /= table_num; - - g_array_free(array, TRUE); - } - lambda = next_lambda; - return lambda; -} - -int main(int argc, char * argv[]){ - FacadePhraseIndex phrase_index; - - //gb_char binary file - MemoryChunk * chunk = new MemoryChunk; - chunk->load("../../data/gb_char.bin"); - phrase_index.load(1, chunk); - - //gbk_char binary file - chunk = new MemoryChunk; - chunk->load("../../data/gbk_char.bin"); - phrase_index.load(2, chunk); - - Bigram bigram; - bigram.attach("../../data/bigram.db", NULL); - - Bigram deleted_bigram; - deleted_bigram.attach("../../data/deleted_bigram.db", NULL); - - GArray * system_items = g_array_new(FALSE, FALSE, sizeof(phrase_token_t)); - GArray * user_items = g_array_new(FALSE, FALSE, sizeof(phrase_token_t)); - - deleted_bigram.get_all_items(system_items, user_items); - assert(0 == user_items->len); - g_array_free(user_items, TRUE); - - parameter_t lambda_sum = 0; - int lambda_count = 0; - - for ( int i = 0; i < system_items->len; ++i ){ - phrase_token_t * token = &g_array_index(system_items, phrase_token_t, i); - SingleGram * system = NULL, * user = NULL; - bigram.load(*token, system, user); - assert(NULL == user); - SingleGram * deleted_system = NULL, * deleted_user = NULL; - deleted_bigram.load(*token, deleted_system, deleted_user); - assert(NULL == deleted_user); - - parameter_t lambda = compute_interpolation(deleted_system, &phrase_index, system); - - printf("lambda:%f\n", lambda); - - lambda_sum += lambda; - lambda_count ++; - - if (system) delete system; - delete deleted_system; - } - - printf("average lambda:%f\n", (lambda_sum/lambda_count)); - g_array_free(system_items, TRUE); -} - |