//-------------------------------------------------------------------------
public virtual void coverage()
{
coverImmutableBean(DoubleMatrix.EMPTY);
coverImmutableBean(DoubleMatrix.of(2, 3, 1d, 2d, 3d, 4d, 5d, 6d));
}
public virtual void test_of()
{
assertMatrix(DoubleMatrix.of());
}
//-------------------------------------------------------------------------
public virtual void test_identity()
{
assertMatrix(DoubleMatrix.identity(0));
assertMatrix(DoubleMatrix.identity(2), 1d, 0d, 0d, 1d);
}
//-------------------------------------------------------------------------
public virtual void test_diagonal()
{
assertMatrix(DoubleMatrix.diagonal(DoubleArray.EMPTY));
assertMatrix(DoubleMatrix.diagonal(DoubleArray.of(2d, 3d, 4d)), 2d, 0d, 0d, 0d, 3d, 0d, 0d, 0d, 4d);
assertEquals(DoubleMatrix.diagonal(DoubleArray.of(1d, 1d, 1d)), DoubleMatrix.identity(3));
}
//-------------------------------------------------------------------------
/// <summary>
/// Transposes the matrix.
/// <para>
/// This converts a matrix of {@code m x n} into a matrix of {@code n x m}.
/// Each element is moved to the opposite position.
///
/// </para>
/// </summary>
/// <returns> the transposed matrix </returns>
public DoubleMatrix transpose()
{
return(DoubleMatrix.of(columns, rows, (i, j) => array[j][i]));
}