public static void CopyRow(SparseRowMatrixArr to, int row, SparseRowMatrixArr from, int fromRow)
{
int frl = from.rowLength(fromRow);
if (frl == 0)
{
return;
}
if (to.val[row] == null)
{
to.val[row] = new SparseRowValue[frl];
}
else if (to.val[row].Length != frl)
{
Array.Resize(ref to.val[row], frl);
}
Array.Copy(from.val[fromRow], to.val[row], frl);
}
public SparseMatrix Transpose()
{
SparseRowMatrixArr trans = new SparseRowMatrixArr(colCount, rowCount);
int[] rowCounts = new int[colCount];
rowCounts.Initialize();
for (int i = 0; i < rowCount; i++)
{
int len = (val[i] == null) ? 0 : val[i].Length;
for (int j = 0; j < len; j++)
{
rowCounts[val[i][j].index]++;
}
}
for (int i = 0; i < colCount; i++)
{
trans.val[i] = new SparseRowValue[rowCounts[i]];
rowCounts[i] = 0;
}
for (int i = 0; i < val.Length; i++)
{
int len = (val[i] == null) ? 0 : val[i].Length;
for (int j = 0; j < len; j++)
{
int col = val[i][j].index;
trans.val[col][rowCounts[col]].index = i;
trans.val[col][rowCounts[col]].value = val[i][j].value;
rowCounts[col]++;
}
}
return(trans);
}
public void CopyRow(int toRow, SparseMatrix from, int fromRow)
{
SparseRowMatrixArr.CopyRow(this, toRow, (SparseRowMatrixArr)from, fromRow);
}