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#pragma once
#include <util/generic/ymath.h>
#include <util/generic/algorithm.h>
#include <util/generic/yexception.h>
namespace NGreedyDict {
enum EEntryScore {
ES_COUNT,
ES_LEN_COUNT,
ES_SIMPLE,
ES_LEN_SIMPLE,
ES_SOLAR
};
enum EEntryStatTest {
EST_NONE = 0,
EST_SIMPLE_NORM = 2
};
inline float ModelP(ui32 countA, ui32 countB, ui32 total) {
return float(countA) * countB / total / total;
}
// P (ab | dependent)
inline float SimpleTest(float modelp, ui32 countAB, ui32 total) {
float realp = float(countAB) / total;
return modelp >= realp ? 0 : (realp - modelp);
}
inline float SolarTest(float modelp, ui32 countAB, ui32 total) {
float realp = float(countAB) / total;
return modelp >= realp ? 0 : (modelp + realp * (log(realp / modelp) - 1));
}
// P (ab | dependent) / P (ab)
inline float SimpleTestNorm(float modelp, ui32 countAB, ui32 total) {
float realp = float(countAB) / total;
return modelp >= realp ? 0 : (realp - modelp) / realp;
}
inline float StatTest(EEntryStatTest test, float modelp, ui32 countAB, ui32 total) {
if (!total) {
return 0;
}
switch (test) {
case EST_NONE:
return 1;
case EST_SIMPLE_NORM:
return SimpleTestNorm(modelp, countAB, total);
}
Y_FAIL("no way!");
return 0;
}
inline float Score(EEntryScore score, ui32 len, float modelp, ui32 count, ui32 total) {
if (!total) {
return 0;
}
ui32 m = 1;
switch (score) {
case ES_LEN_COUNT:
m = len;
[[fallthrough]];
case ES_COUNT:
return m * count;
case ES_LEN_SIMPLE:
m = len;
[[fallthrough]];
case ES_SIMPLE:
return m * SimpleTest(modelp, count, total);
case ES_SOLAR:
return SolarTest(modelp, count, total);
}
Y_FAIL("no way!");
return 0;
}
}
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