public override void Init(int nrows1, int ncols)
{
nrows = nrows1;
vals = new SparseFloatVector[ncols];
for (int i = 0; i < ncols; i++)
{
vals[i] = new SparseFloatVector(new int[0], new float[0], nrows);
}
}
public override void Init(int nrows, int ncolumns1)
{
ncolumns = ncolumns1;
vals = new SparseFloatVector[nrows];
for (int i = 0; i < nrows; i++)
{
vals[i] = new SparseFloatVector(new int[0], new float[0], ncolumns);
}
}
public override MatrixIndexer ExtractRows(IList <int> rows)
{
SparseFloatVector[] r = new SparseFloatVector[vals.Length];
for (int i = 0; i < vals.Length; i++)
{
r[i] = (SparseFloatVector)vals[i].SubArray(rows);
}
return(new SparseColumnFloatMatrixIndexer {
vals = r, nrows = rows.Count
});
}
public override object Clone()
{
if (vals == null)
{
return(new SparseColumnFloatMatrixIndexer());
}
SparseFloatVector[] v = new SparseFloatVector[vals.Length];
for (int i = 0; i < v.Length; i++)
{
v[i] = (SparseFloatVector)vals[i].Clone();
}
return(new SparseColumnFloatMatrixIndexer {
vals = v, nrows = nrows
});
}
public override void Set(float[,] value)
{
nrows = value.GetLength(0);
vals = new SparseFloatVector[value.GetLength(1)];
for (int i = 0; i < vals.Length; i++)
{
List <int> v = new List <int>();
for (int j = 0; j < nrows; j++)
{
if (value[j, i] == 0)
{
continue;
}
v.Add(j);
}
int[] v1 = v.ToArray();
float[] x = new float[v1.Length];
for (int j = 0; j < v1.Length; j++)
{
x[j] = value[v1[j], i];
}
vals[i] = new SparseFloatVector(v1, x, nrows);
}
}
public override void Set(double[,] value)
{
ncolumns = value.GetLength(1);
vals = new SparseFloatVector[value.GetLength(0)];
for (int i = 0; i < vals.Length; i++)
{
List <int> v = new List <int>();
for (int j = 0; j < ncolumns; j++)
{
if (value[i, j] == 0)
{
continue;
}
v.Add(j);
}
int[] v1 = v.ToArray();
float[] x = new float[v1.Length];
for (int j = 0; j < v1.Length; j++)
{
x[j] = (float)value[i, v1[j]];
}
vals[i] = new SparseFloatVector(v1, x, ncolumns);
}
}
