/// <summary>
/// Retransforms this instance.
/// </summary>
/// <returns></returns>
public DataMatrix Retransform(int levelCount)
{
var matrix = new DataMatrix(MatrixType.Retransformed, this.ColumnCount);
foreach (DataRow row in this.Rows)
{
int halfGroupCount = this.ColumnCount;
var tmpRow = row.RowValues.ToArray();
for (int currentLevel = 0; currentLevel < levelCount; currentLevel++)
{
halfGroupCount = halfGroupCount / 2;
int groupLen = Convert.ToInt32(Math.Pow(2.0, currentLevel));
for (int j = 0; j < halfGroupCount; j++)
{
var r = tmpRow.ToList().ToArray();
var s = tmpRow.ToList().ToArray();
var groupOffset = (this.ColumnCount * j) / halfGroupCount;
for (int i = 0; i < groupLen; i++)
{
var a = tmpRow[groupOffset + i];
var d = tmpRow[groupOffset + groupLen + i];
r[i] = (a + d) / Math.Sqrt(2.0);
s[i] = (a - d) / Math.Sqrt(2.0);
// r[i] = (tmpRow[p + i] + tmpRow[p + h + i]) / Math.Sqrt(2.0);
// s[i] = (tmpRow[p + i] - tmpRow[p + h + i]) / Math.Sqrt(2.0);
}
for (int i = 0; i < groupLen; i++)
{
tmpRow[groupOffset + (2 * i)] = r[i];
tmpRow[groupOffset + (2 * i) + 1] = s[i];
}
}
}
for (int i = 0; i < tmpRow.Count(); i++)
{
tmpRow[i] = Math.Round(tmpRow[i], 0);
}
var nr = new DataRow(tmpRow);
matrix.Rows.Add(nr);
}
return(matrix);
}
/// <summary>
/// Retransforms this instance.
/// </summary>
/// <returns></returns>
public DataMatrix Retransform(int levelCount)
{
var matrix = new DataMatrix(MatrixType.Retransformed, this.ColumnCount);
foreach (DataRow row in this.Rows)
{
int halfGroupCount = this.ColumnCount;
var tmpRow = row.RowValues.ToArray();
for (int currentLevel = 0; currentLevel < levelCount; currentLevel++)
{
halfGroupCount = halfGroupCount / 2;
int groupLen = Convert.ToInt32(Math.Pow(2.0, currentLevel));
for (int j = 0; j < halfGroupCount; j++)
{
var r = tmpRow.ToList().ToArray();
var s = tmpRow.ToList().ToArray();
var groupOffset = (this.ColumnCount * j) / halfGroupCount;
for (int i = 0; i < groupLen; i++)
{
var a = tmpRow[groupOffset + i];
var d = tmpRow[groupOffset + groupLen + i];
r[i] = (a + d) / Math.Sqrt(2.0);
s[i] = (a - d) / Math.Sqrt(2.0);
// r[i] = (tmpRow[p + i] + tmpRow[p + h + i]) / Math.Sqrt(2.0);
// s[i] = (tmpRow[p + i] - tmpRow[p + h + i]) / Math.Sqrt(2.0);
}
for (int i = 0; i < groupLen; i++)
{
tmpRow[groupOffset + (2 * i)] = r[i];
tmpRow[groupOffset + (2 * i) + 1] = s[i];
}
}
}
for (int i = 0; i < tmpRow.Count(); i++)
{
tmpRow[i] = Math.Round(tmpRow[i], 0);
}
var nr = new DataRow(tmpRow);
matrix.Rows.Add(nr);
}
return matrix;
}
/// <summary>
/// The transform single step.
/// </summary>
/// <param name="row">The row.</param>
/// <param name="step">The step.</param>
/// <returns></returns>
public List<DataGroup> TransformSingleStep(int row, int step)
{
var matrixOrig = new DataMatrix(this.UntransformedAsciiFilePath);
Trace.WriteLine(string.Format("Original matrix ascii import completed, imported {0} rows.", matrixOrig.Rows.Count));
var dataRow = matrixOrig.Rows[row];
var groups = dataRow.CalculateTransformedGroups(step);
return groups;
}
/// <summary>
/// Transforms all rows.
/// </summary>
public void TransformAllRows()
{
this.OriginalMatrix = new DataMatrix(this.UntransformedAsciiFilePath);
Trace.WriteLine(string.Format("Original matrix ascii import completed, imported {0} rows.", this.OriginalMatrix.Rows.Count));
var matrixTrans = new DataMatrix(MatrixType.Transformed, this.OriginalMatrix.ColumnCount);
// transform row by row
for (int i = 0; i < this.OriginalMatrix.Rows.Count; i++)
{
// use the required level
var groups = this.OriginalMatrix.Rows[i].CalculateTransformedGroups(this.OriginalMatrix.MaxLevelCount);
matrixTrans.Rows.Add(new DataRow(groups));
}
// create output ascii file for transformed matrix
matrixTrans.WriteToAsciiFile(this.TransformedAsciiFilePath);
this.TransformedMatrix = matrixTrans;
}
