関連ワード:  how to add column to matrix python    how to add column to array python    how to add column to matrix numpy    how to add column to 2d array python    how to add column to numpy array    how to add column names to numpy array    how to add new column to numpy array    how to add a new column to a matrix in python    how to add a column vector to a matrix in python    how to add a column of ones to a matrix in python