ExampleGroupStats.h
Go to the documentation of this file.00001 #ifndef EXAMPLEGROUPSTATSH 00002 #define EXAMPLEGROUPSTATSH 00003 00004 #include "vfml.h" 00005 00021 typedef struct _Bin_ { 00022 float lowerBound, upperBound; 00023 float *classTotals; 00024 float exampleCount; 00025 int boundryClass; 00026 long boundryCount; 00027 } Bin, *BinPtr; 00028 00029 BinPtr BinNew(ExampleSpecPtr spec); 00030 void BinFree(BinPtr bin); 00031 void BinWrite(BinPtr bin, FILE *out); 00032 00033 typedef struct _ContinuousTracker_ { 00034 ExampleSpecPtr spec; 00035 float *classTotals; 00036 long exampleCount; 00037 VoidListPtr bins; 00038 float min, max; 00039 int initMinMax; 00040 int timesPrunedCount; 00041 int addingNewBins; 00042 } ContinuousTracker, *ContinuousTrackerPtr; 00043 00044 ContinuousTrackerPtr ContinuousTrackerNew(ExampleSpecPtr spec); 00045 void ContinuousTrackerFree(ContinuousTrackerPtr ct); 00046 void ContinuousTrackerAddExample(ContinuousTrackerPtr ct, 00047 float value, int theclass); 00048 float ContinuousTrackerGetPercentBelowThreshold(ContinuousTrackerPtr ct, 00049 float thresh); 00050 00051 int ContinuousTrackerNumSplitThresholds(ContinuousTrackerPtr ct); 00052 int ContinuousTrackerGetMostCommonClassInPartition(ContinuousTrackerPtr ct, 00053 float threshold, int above); 00054 00055 void ContinuousTrackerEntropyAttributeSplit(ContinuousTrackerPtr ct, 00056 float *firstIndex, float *firstThresh, 00057 float *secondIndex, float *secondThresh); 00058 void ContinuousTrackerGiniAttributeSplit(ContinuousTrackerPtr ct, 00059 float *firstIndex, float *firstThresh, 00060 float *secondIndex, float *secondThresh); 00061 00062 void ContinuousTrackerDisableWorseThanEntropy(ContinuousTrackerPtr ct, 00063 float entropyThresh); 00064 void ContinuousTrackerDisableWorseThanGini(ContinuousTrackerPtr ct, 00065 float giniThresh); 00066 int ContinuousTrackerPruneSplitsEntropy(ContinuousTrackerPtr ct, 00067 int maxSplits, int pruneDownTo); 00068 00070 typedef struct _ExampleGroupStats_ { 00071 ExampleSpecPtr spec; 00072 AttributeTrackerPtr attributeTracker; 00073 00074 long examplesSeen; 00075 00076 long *classTotals; 00077 00078 /* VoidListPtr for each attribute: 00079 for discrete attributes another VoidListPtr for each value, and an 00080 array of longs with the count for each class 00081 for continuous attributes a continuous tracker structure 00082 */ 00083 VoidAListPtr stats; 00084 00085 } ExampleGroupStats, *ExampleGroupStatsPtr; 00086 00087 00100 ExampleGroupStatsPtr ExampleGroupStatsNew(ExampleSpecPtr es, 00101 AttributeTrackerPtr at); 00102 00104 void ExampleGroupStatsFree(ExampleGroupStatsPtr egs); 00105 00115 void ExampleGroupStatsDeactivate(ExampleGroupStatsPtr egs); 00116 00118 void ExampleGroupStatsReactivate(ExampleGroupStatsPtr egs); 00119 00121 void ExampleGroupStatsAddExample(ExampleGroupStatsPtr egs, ExamplePtr e); 00122 00124 void ExampleGroupStatsWrite(ExampleGroupStatsPtr egs, FILE *out); 00125 00132 long ExampleGroupStatsNumExamplesSeen(ExampleGroupStatsPtr egs); 00133 00134 00136 AttributeTrackerPtr ExampleGroupStatsGetAttributeTracker( 00137 ExampleGroupStatsPtr egs); 00138 00145 int ExampleGroupStatsIsAttributeActive(ExampleGroupStatsPtr egs, int num); 00146 00154 void ExampleGroupStatsIgnoreAttribute(ExampleGroupStatsPtr egs, int num); 00155 00156 00165 int ExampleGroupStatsGetMostCommonClassLaplace(ExampleGroupStatsPtr egs, 00166 int addClass, int addCount); 00168 int ExampleGroupStatsGetMostCommonClass(ExampleGroupStatsPtr egs); 00169 00171 long ExampleGroupStatsGetMostCommonClassCount(ExampleGroupStatsPtr egs); 00172 00173 00178 int ExampleGroupStatsGetMostCommonClassForAttVal(ExampleGroupStatsPtr egs, 00179 int att, int val); 00180 00182 int ExampleGroupStatsIsPure(ExampleGroupStatsPtr egs); 00183 00188 float ExampleGroupStatsGetValuePercent(ExampleGroupStatsPtr egs, 00189 int attNum, int valNum); 00190 float ExampleGroupStatsGetValueGivenClassPercent(ExampleGroupStatsPtr egs, 00191 int attNum, int valNum, int classNum); 00192 00202 double ExampleGroupStatsGetValueGivenClassMEstimate(ExampleGroupStatsPtr egs, 00203 int attNum, int valNum, int classNum); 00204 00206 float ExampleGroupStatsGetClassPercent(ExampleGroupStatsPtr egs, int classNum); 00207 00212 float ExampleGroupStatsGetPercentBelowThreshold(ExampleGroupStatsPtr egs, 00213 int attNum, float thresh); 00214 00215 /* for naive bayes */ 00216 00226 double ExampleGroupStatsGetValueGivenClassMEstimateLogP(ExampleGroupStatsPtr 00227 egs, int attNum, int valNum, int classNum); 00228 00230 double ExampleGroupStatsGetClassLogP(ExampleGroupStatsPtr egs, int classNum); 00231 00232 00234 float ExampleGroupStatsEntropyTotal(ExampleGroupStatsPtr egs); 00235 00240 float ExampleGroupStatsEntropyDiscreteAttributeSplit(ExampleGroupStatsPtr egs, 00241 int attNum); 00242 00251 float ExampleGroupStatsEntropyPlusDiscreteAttributeSplit(ExampleGroupStatsPtr 00252 egs, int attNum, float delta); 00253 00254 00263 float ExampleGroupStatsEntropyMinusDiscreteAttributeSplit(ExampleGroupStatsPtr 00264 egs, int attNum, float delta); 00265 00266 00279 void ExampleGroupStatsEntropyContinuousAttributeSplit(ExampleGroupStatsPtr egs, 00280 int attNum, float *firstIndex, float *firstThresh, 00281 float *secondIndex, float *secondThresh); 00282 00284 float ExampleGroupStatsGiniTotal(ExampleGroupStatsPtr egs); 00285 00291 float ExampleGroupStatsGiniDiscreteAttributeSplit(ExampleGroupStatsPtr egs, 00292 int attNum); 00293 00304 void ExampleGroupStatsGiniContinuousAttributeSplit(ExampleGroupStatsPtr egs, 00305 int attNum, float *firstIndex, float *firstThresh, 00306 float *secondIndex, float *secondThresh); 00307 00319 void ExampleGroupStatsIgnoreSplitsWorseThanEntropy(ExampleGroupStatsPtr egs, 00320 int attNum, float entropyThresh); 00321 00333 void ExampleGroupStatsIgnoreSplitsWorseThanGini(ExampleGroupStatsPtr egs, 00334 int attNum, float giniThresh); 00335 00336 00351 int ExampleGroupStatsLimitSplitsEntropy(ExampleGroupStatsPtr egs, int attNum, 00352 int maxSplits, int pruneDownTo); 00353 00358 void ExampleGroupStatsStopAddingSplits(ExampleGroupStatsPtr egs, int attNum); 00359 00364 int ExampleGroupStatsNumSplitThresholds(ExampleGroupStatsPtr egs, int attNum); 00365 00370 int ExampleGroupStatsGetMostCommonClassAboveThreshold(ExampleGroupStatsPtr egs, 00371 int attNum, float threshold); 00372 int ExampleGroupStatsGetMostCommonClassBelowThreshold(ExampleGroupStatsPtr egs, 00377 int attNum, float threshold); 00378 00379 /* undocumented, used by CVFDT */ 00380 void ExampleGroupStatsRemoveExample(ExampleGroupStatsPtr egs, ExamplePtr e); 00381 00382 #endif /* EXAMPLEGROUPSTATSH */
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