//---------------------------------------------------------------------------
// Count the number of distortions.
// Each time a record is generalized from a child value to a parent value,
// we charge 1 unit of distortion. So if 100 records are involved in the
// generalization, we charge 100 unit.
//---------------------------------------------------------------------------
bool CTDEvalMgr::countNumDistortions(int& catDistortion, float& contDistortion)
{
cout << _T("Counting number of distortions...") << endl;
catDistortion = 0;
contDistortion = 0.0f;
int nRecs = 0, nValues = 0;
CTDRecord* pRec = NULL;
CTDAttrib* pAttrib = NULL;
CTDPartition* pPartition = NULL;
CTDValue* pValue = NULL;
CTDConcept* pCurrentConcept = NULL;
CTDConcept* pRawConcept = NULL;
CTDPartitions* pLeafPartitions = m_pPartitioner->getLeafPartitions();
// For each partition.
for (POSITION leafPos = pLeafPartitions->GetHeadPosition(); leafPos != NULL;) {
pPartition = pLeafPartitions->GetNext(leafPos);
nRecs = pPartition->getNumRecords();
// For each record.
for (int r = 0; r < nRecs; ++r) {
pRec = pPartition->getRecord(r);
nValues = pRec->getNumValues();
// For each value.
for (int v = 0; v < nValues; ++v) {
pAttrib = m_pAttribMgr->getAttribute(v);
if (!pAttrib->m_bVirtualAttrib)
continue;
pValue = pRec->getValue(v);
pCurrentConcept = pValue->getCurrentConcept();
if (pAttrib->isContinuous()) {
CTDContConcept* pContConcept = (CTDContConcept*) pCurrentConcept;
CTDContConcept* pRoot = (CTDContConcept*) pAttrib->getConceptRoot();
contDistortion += (pContConcept->m_upperBound - pContConcept->m_lowerBound) / (pRoot->m_upperBound - pRoot->m_lowerBound);
}
else {
pRawConcept = ((CTDStringValue*) pValue)->getRawConcept();
#if defined(_TD_SCORE_FUNTION_TRANSACTION)
// In case of transaction data, count a distortion only if suppressing "1".
if (pRawConcept->m_conceptValue.CompareNoCase(TD_TRANSACTION_ITEM_PRESENT) != 0)
continue;
#endif
if (pRawConcept->m_depth < 0 || pCurrentConcept->m_depth < 0) {
cout << _T("CSAEvalMgr::countNumDistortions: Negative depth.") << endl;
ASSERT(false);
return false;
}
catDistortion += pRawConcept->m_depth - pCurrentConcept->m_depth;
}
}
}
}
cout << _T("Counting number of distortions succeeded.") << endl;
return true;
}