code: def lagadd(c1, c2):
      """
      Add one Laguerre series to another.
  
      Returns the sum of two Laguerre series `c1` + `c2`.  The arguments
      are sequences of coefficients ordered from lowest order term to
      highest, i.e., [1,2,3] represents the series ``P_0 + 2*P_1 + 3*P_2``.
  
      Parameters
      ----------
      c1, c2 : array_like
          1-D arrays of Laguerre series coefficients ordered from low to
          high.
  
      Returns
      -------
      out : ndarray
          Array representing the Laguerre series of their sum.
  
      See Also
      --------
      lagsub, lagmulx, lagmul, lagdiv, lagpow
  
      Notes
      -----
      Unlike multiplication, division, etc., the sum of two Laguerre series
      is a Laguerre series (without having to "reproject" the result onto
      the basis set) so addition, just like that of "standard" polynomials,
      is simply "component-wise."
  
      Examples
      --------
      >>> from numpy.polynomial.laguerre import lagadd
      >>> lagadd([1, 2, 3], [1, 2, 3, 4])
      array([2.,  4.,  6.,  4.])
  
  
      """
      return pu._add(c1, c2)
  
imports: import numpy
  import numpy.linalg
  from numpy.core.multiarray import normalize_axis_index
  from .None import polyutils
  from ._polybase import ABCPolyBase
label_desc: Use image node_id 5 for calling a global function with example usage: lagadd(c1, c2) and returns: pu