blob: 3ffc238afbb49262977f937fbd48097a66f3a996 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
#ifndef _TTABLES_H_
#define _TTABLES_H_
#include <iostream>
#include <map>
#include "wordid.h"
#include "prob.h"
#include "tdict.h"
class TTable {
public:
TTable() {}
typedef std::map<WordID, double> Word2Double;
typedef std::map<WordID, Word2Double> Word2Word2Double;
inline const prob_t prob(const int& e, const int& f) const {
const Word2Word2Double::const_iterator cit = ttable.find(e);
if (cit != ttable.end()) {
const Word2Double& cpd = cit->second;
const Word2Double::const_iterator it = cpd.find(f);
if (it == cpd.end()) return prob_t(0.00001);
return prob_t(it->second);
} else {
return prob_t(0.00001);
}
}
inline void Increment(const int& e, const int& f) {
counts[e][f] += 1.0;
}
inline void Increment(const int& e, const int& f, double x) {
counts[e][f] += x;
}
void Normalize() {
ttable.swap(counts);
for (Word2Word2Double::iterator cit = ttable.begin();
cit != ttable.end(); ++cit) {
double tot = 0;
Word2Double& cpd = cit->second;
for (Word2Double::iterator it = cpd.begin(); it != cpd.end(); ++it)
tot += it->second;
for (Word2Double::iterator it = cpd.begin(); it != cpd.end(); ++it)
it->second /= tot;
}
counts.clear();
}
// adds counts from another TTable - probabilities remain unchanged
TTable& operator+=(const TTable& rhs) {
for (Word2Word2Double::const_iterator it = rhs.counts.begin();
it != rhs.counts.end(); ++it) {
const Word2Double& cpd = it->second;
Word2Double& tgt = counts[it->first];
for (Word2Double::const_iterator j = cpd.begin(); j != cpd.end(); ++j) {
tgt[j->first] += j->second;
}
}
return *this;
}
void ShowTTable() {
for (Word2Word2Double::iterator it = ttable.begin(); it != ttable.end(); ++it) {
Word2Double& cpd = it->second;
for (Word2Double::iterator j = cpd.begin(); j != cpd.end(); ++j) {
std::cerr << "P(" << TD::Convert(j->first) << '|' << TD::Convert(it->first) << ") = " << j->second << std::endl;
}
}
}
void ShowCounts() {
for (Word2Word2Double::iterator it = counts.begin(); it != counts.end(); ++it) {
Word2Double& cpd = it->second;
for (Word2Double::iterator j = cpd.begin(); j != cpd.end(); ++j) {
std::cerr << "c(" << TD::Convert(j->first) << '|' << TD::Convert(it->first) << ") = " << j->second << std::endl;
}
}
}
void DeserializeProbsFromText(std::istream* in);
void SerializeCounts(std::string* out) const { SerializeHelper(out, counts); }
void DeserializeCounts(const std::string& in) { DeserializeHelper(in, &counts); }
void SerializeProbs(std::string* out) const { SerializeHelper(out, ttable); }
void DeserializeProbs(const std::string& in) { DeserializeHelper(in, &ttable); }
private:
static void SerializeHelper(std::string*, const Word2Word2Double& o);
static void DeserializeHelper(const std::string&, Word2Word2Double* o);
public:
Word2Word2Double ttable;
Word2Word2Double counts;
};
#endif
|
