ph-math/src/main/java/com/helger/numbercruncher/matrix/Matrix.java
public ColumnVector getColumn (final int c) throws MatrixException
  {
    if ((c < 0) || (c >= m_nCols))
    {
      throw new MatrixException (MatrixException.INVALID_INDEX);
    }

    final ColumnVector cv = new ColumnVector (m_nRows);
    for (int r = 0; r < m_nRows; ++r)
    {
      cv.m_aValues[r][0] = m_aValues[r][c];
    }

    return cv;
  }
public ColumnVector getColumn (final int c) throws MatrixException
  {
    if ((c < 0) || (c >= m_nCols))
    {
      throw new MatrixException (MatrixException.INVALID_INDEX);
    }

    final ColumnVector cv = new ColumnVector (m_nRows);
    for (int r = 0; r < m_nRows; ++r)
    {
      cv.m_aValues[r][0] = m_aValues[r][c];
    }

    return cv;
  }
public ColumnVector getColumn ( final int c ) throws MatrixException { if ( ( c < 0 ) || ( c >= m_nCols ) ) { throw new MatrixException ( MatrixException . INVALID_INDEX ) ; } final ColumnVector cv = new ColumnVector ( m_nRows ) ; for ( int r = 0 ; r < m_nRows ; ++ r ) { cv . m_aValues [ r ] [ 0 ] = m_aValues [ r ] [ c ] ; } return cv ; }
Get a column of this matrix.

@param c
the column index
@return the column as a column vector
@throws MatrixException
for an invalid index
Get a column of this matrix .