将astropy.table.columns转换为numpy数组

I'd like to plot points:

我想绘制积分:

points = np.random.multivariate_normal(mean=(0,0), cov=[[0.4,9],[9,10]],size=int(1e4))

print(points)
  [[-2.50584156  2.77190372]
   [ 2.68192136 -3.83203819]
   ..., 
   [-1.10738221 -1.72058301]
   [ 3.75168017  5.6905342 ]]

print(type(points))
  <class 'numpy.ndarray'>

data = ascii.read(datafile)  
type(data['ra'])
  astropy.table.column.Column
type(data['dec'])
 astropy.table.column.Column
points = n