/// <summary>
/// Takes the two specified documents and creates two new document vectors with the missing terms from each.
/// Row 0: document 1
/// Row 1: document 2
/// </summary>
/// <param name="matrix1">document1 container</param>
/// <param name="document1">document1 index</param>
/// <param name="matrix2">document2 container</param>
/// <param name="document2">document2 index</param>
/// <returns>New term-by-document matrix containing the two documents and their term maps</returns>
public static TermDocumentMatrix EqualizeDocuments(TermDocumentMatrix matrix1, int document1, TermDocumentMatrix matrix2, int document2)
{
// initialize new TermDocumentMatrix
TermDocumentMatrix newmatrix = new TermDocumentMatrix();
newmatrix._matrix = new double[2][];
newmatrix._termIndex = new List <string>();
newmatrix._termIndexLookup = new Dictionary <string, int>();
newmatrix._docIndex = new List <string>();
newmatrix._docIndexLookup = new Dictionary <string, int>();
newmatrix._docIndex.Add(matrix1.GetDocumentName(document1));
newmatrix._docIndexLookup.Add(matrix1.GetDocumentName(document1), newmatrix._docIndex.Count - 1);
newmatrix._docIndex.Add(matrix2.GetDocumentName(document2));
newmatrix._docIndexLookup.Add(matrix2.GetDocumentName(document2), newmatrix._docIndex.Count - 1);
List <double> doc1 = new List <double>();
List <double> doc2 = new List <double>();
// compute total term set
Dictionary <string, int> leftovers = new Dictionary <string, int>(matrix2._termIndexLookup);
foreach (string term in matrix1._termIndex)
{
newmatrix._termIndex.Add(term);
newmatrix._termIndexLookup.Add(term, newmatrix._termIndex.Count - 1);
doc1.Add(matrix1.GetValue(document1, matrix1.GetTermIndex(term)));
if (matrix2._termIndexLookup.ContainsKey(term))
{
leftovers.Remove(term);
doc2.Add(matrix2.GetValue(document2, matrix2.GetTermIndex(term)));
}
else
{
doc2.Add(0.0);
}
}
foreach (string term in leftovers.Keys)
{
newmatrix._termIndex.Add(term);
newmatrix._termIndexLookup.Add(term, newmatrix._termIndex.Count - 1);
doc1.Add(0.0);
doc2.Add(matrix2.GetValue(document2, matrix2.GetTermIndex(term)));
}
newmatrix._matrix[0] = doc1.ToArray();
newmatrix._matrix[1] = doc2.ToArray();
return(newmatrix);
}
/// <summary>
/// Takes the two specified documents and creates two new document vectors with the missing terms from each.
/// Row 0: document 1
/// Row 1: document 2
/// </summary>
/// <param name="matrix1">document1 container</param>
/// <param name="document1">document1 index</param>
/// <param name="matrix2">document2 container</param>
/// <param name="document2">document2 index</param>
/// <returns>New term-by-document matrix containing the two documents and their term maps</returns>
public static TermDocumentMatrix EqualizeDocuments(TermDocumentMatrix matrix1, int document1, TermDocumentMatrix matrix2, int document2)
{
// initialize new TermDocumentMatrix
TermDocumentMatrix newmatrix = new TermDocumentMatrix();
newmatrix._matrix = new double[2][];
newmatrix._termIndex = new List<string>();
newmatrix._termIndexLookup = new Dictionary<string, int>();
newmatrix._docIndex = new List<string>();
newmatrix._docIndexLookup = new Dictionary<string, int>();
newmatrix._docIndex.Add(matrix1.GetDocumentName(document1));
newmatrix._docIndexLookup.Add(matrix1.GetDocumentName(document1), newmatrix._docIndex.Count - 1);
newmatrix._docIndex.Add(matrix2.GetDocumentName(document2));
newmatrix._docIndexLookup.Add(matrix2.GetDocumentName(document2), newmatrix._docIndex.Count - 1);
List<double> doc1 = new List<double>();
List<double> doc2 = new List<double>();
// compute total term set
Dictionary<string, int> leftovers = new Dictionary<string,int>(matrix2._termIndexLookup);
foreach (string term in matrix1._termIndex)
{
newmatrix._termIndex.Add(term);
newmatrix._termIndexLookup.Add(term, newmatrix._termIndex.Count - 1);
doc1.Add(matrix1.GetValue(document1, matrix1.GetTermIndex(term)));
if (matrix2._termIndexLookup.ContainsKey(term))
{
leftovers.Remove(term);
doc2.Add(matrix2.GetValue(document2, matrix2.GetTermIndex(term)));
}
else
{
doc2.Add(0.0);
}
}
foreach (string term in leftovers.Keys)
{
newmatrix._termIndex.Add(term);
newmatrix._termIndexLookup.Add(term, newmatrix._termIndex.Count - 1);
doc1.Add(0.0);
doc2.Add(matrix2.GetValue(document2, matrix2.GetTermIndex(term)));
}
newmatrix._matrix[0] = doc1.ToArray();
newmatrix._matrix[1] = doc2.ToArray();
return newmatrix;
}
