/// <summary>
/// Convert a <see cref="FieldMatrix"/>/<see cref="BigFraction"/> matrix to a
/// <see cref="RealMatrix"/>.
/// </summary>
/// <param name="m">Matrix to convert.</param>
/// <returns>the converted matrix.</returns>
public static Array2DRowRealMatrix bigFractionMatrixToRealMatrix(FieldMatrix <BigFraction> m)
{
BigFractionMatrixConverter converter = new BigFractionMatrixConverter();
m.walkInOptimizedOrder(converter);
return(converter.getConvertedMatrix());
}
/// <inheritdoc/>
public FieldMatrix <T> getSubMatrix(int[] selectedRows, int[] selectedColumns)
{
// safety checks
checkSubMatrixIndex(selectedRows, selectedColumns);
// copy entries
FieldMatrix <T> subMatrix =
createMatrix(selectedRows.Length, selectedColumns.Length);
subMatrix.walkInOptimizedOrder(new DefaultFieldMatrixChangingVisitorAnonymous1 <T>(field.getZero(), selectedRows, selectedColumns, this));
return(subMatrix);
}