t3toolbox.corewise.corewise_sub
===============================

.. py:function:: t3toolbox.corewise.corewise_sub(X: NDArrayTree, Y: NDArrayTree) -> NDArrayTree

   Subtract nested objects, X,Y -> X-Y.

   .. rubric:: Examples

   >>> import numpy as np
   >>> import t3toolbox.corewise as cw
   >>> X = (np.ones(3), (1, (), np.ones(2)))
   >>> Y = (2*np.ones(3), (3, (), -np.ones(2)))
   >>> print(cw.corewise_sub(X, Y))
   (array([-1., -1., -1.]), (-2, (), array([2., 2.])))