public void setRow(int rowID, SparseVector rowVec)
{
if (rowVec != null && rowVec.getCount() != 0)
{
matrix[rowID] = rowVec;
}
}
public void setRow(int rowID, SparseVector rowVec)
{
if (rowVec != null && rowVec.getCount() != 0)
{
matrix[rowID] = rowVec;
}
}
public SparseVector getColMaxVec()
{
SparseVector newVec = new SparseVector();
foreach (int rowID in matrix.Keys)
{
SparseVector rowVec = (SparseVector)matrix[rowID];
if (rowVec != null && rowVec.getCount() != 0)
{
newVec[rowID] = rowVec.getMax();
}
}
return(newVec);
}
public SparseVector getSumofRows()//correct
{
SparseVector newVec = new SparseVector();
foreach (int rowID in matrix.Keys)
{
SparseVector rowVec = (SparseVector)matrix[rowID];
if (rowVec != null && rowVec.getCount() != 0)
{
newVec[rowID] = rowVec.getSum();
}
}
return(newVec);
}
public SparseMatrix getSubMatrix(HashSet <int> rowIDSet, HashSet <int> colIDSet)
{
SparseMatrix submatrix = new SparseMatrix();
foreach (int ID in rowIDSet)
{
SparseVector rowVec = getRow(ID);
SparseVector subRowVec = rowVec.getSubVec(colIDSet);
if (subRowVec.getCount() > 0)
{
submatrix.setRow(ID, rowVec);
}
}
return(submatrix);
}
public SparseMatrix rowNormalize()
{
SparseMatrix newMat = new SparseMatrix();
foreach (int rowID in matrix.Keys)
{
SparseVector rowVec = matrix[rowID];
if (rowVec != null && rowVec.getCount() != 0)
{
double sum = rowVec.getSum();
SparseVector newVec = rowVec / sum;
newMat.setRow(rowID, newVec);
}
}
return(newMat);
}
public static double dotprod(SparseVector v1, SparseVector v2)
{
double res = 0;
//compare the count of v1 and v2, use the smaller one as base
if (v1.getCount() < v2.getCount())
{
foreach (KeyValuePair <int, double> kvp in v1.vector)
{
res += kvp.Value * v2[kvp.Key];
}
}
else
{
foreach (KeyValuePair <int, double> kvp in v2.vector)
{
res += v1[kvp.Key] * kvp.Value;
}
}
return(res);
}
//write
public void store(string file)
{
FileStream fs_IDrow = File.Create(file + ".IDrow");
FileStream fs_colval = File.Create(file + ".colval");
StreamWriter sw_IDrow = new StreamWriter(fs_IDrow);
BinaryWriter bw_colval = new BinaryWriter(fs_colval);
int count = 0;
foreach (KeyValuePair <int, SparseVector> kvp in matrix)
{
SparseVector rowVec = kvp.Value;
count = count + rowVec.getCount();
sw_IDrow.WriteLine(kvp.Key + "\t" + count);
foreach (KeyValuePair <int, double> kvprow in rowVec.vector)
{
bw_colval.Write(kvprow.Key);
bw_colval.Write(kvprow.Value);
}
}
sw_IDrow.Close();
bw_colval.Close();
}
public static double dotprod(SparseVector v1, SparseVector v2)
{
double res = 0;
//compare the count of v1 and v2, use the smaller one as base
if (v1.getCount() < v2.getCount())
{
foreach (KeyValuePair<int, double> kvp in v1.vector)
{
res += kvp.Value * v2[kvp.Key];
}
}
else
{
foreach (KeyValuePair<int, double> kvp in v2.vector)
{
res += v1[kvp.Key] * kvp.Value;
}
}
return res;
}
