add_padding
===========



.. py:function:: stimupy.utils.add_padding(arr, c, val)


   Remove padding by c

   :param arr: input array
   :type arr: numpy.ndarray
   :param c: padding amount
   :type c: int
   :param val: background value
   :type val: float

   :returns: **arr** -- padded array
   :rtype: numpy.ndarray