public static Vector CalculateTFIDFVector(GroupingQueryResult TargetGroup, List <GroupingQueryResult> Corpus, bool ByRawCount = false)
{
Vector IDFSummedVector = new DenseVector(TargetGroup.ReturnAccessVector().Count);
Vector ReturnVector = new DenseVector(IDFSummedVector.Count);
Parallel.For(0, IDFSummedVector.Count, i => {
foreach (GroupingQueryResult CurrentGQR in Corpus)
{
if (CurrentGQR.GroupingName != TargetGroup.GroupingName)
{
if (CurrentGQR.ReturnAccessVector()[i] > 0)
{
IDFSummedVector[i] = IDFSummedVector[i] + 1;
}
}
}
});
for (int i2 = 0; i2 < IDFSummedVector.Count; i2++)
{
//0.1 has been added to the denominator to prevent divide by zero issues
IDFSummedVector[i2] = Math.Log(Corpus.Count / (IDFSummedVector[i2] + 0.1));
}
if (ByRawCount)
{
return((Vector)IDFSummedVector.PointwiseMultiply(TargetGroup.ReturnRawCountVector()));
}
else
{
return((Vector)IDFSummedVector.PointwiseMultiply(TargetGroup.ReturnAccessVector()));
}
}
public GroupingQueryResult(GroupingQueryResult GQR) : base(GQR.ReturnAccessVector())
{
this.accessSummaryVector = GQR.ReturnAccessVector();
this.rawCountVector = GQR.ReturnRawCountVector();
this.tF_IDFVector = GQR.ReturnTF_IDFVector();
this.aDGroupsRepresented = GQR.ADGroupsRepresented;
this.groupingName = GQR.GroupingName;
this.groupingType = GQR.GroupingType;
this.groupMemberCount = GQR.MemberCount;
this.members = GQR.Members;
}