np.legadd() method is used to add one Legendre series to another.It returns the sum of two Legendre series c1 + c2. 
Syntax :
np.legadd(c1, c2)
Parameters:
c1, c2 :[ array_like ] 1-D arrays of Legendre series coefficients ordered from low to high.Return : [ndarray] Array representing the Legendre series of their sum.
Code #1 :
# Python program explaining # numpy.legadd() method      # importing numpy as np   # and numpy.polynomial.legendre module as geek  import numpy as np  import numpy.polynomial.legendre as geek     # Legendre series coefficients s1 = (1, 3, 5)  s2 = (2, 4, 6)         # using np.legadd() method  res = geek.legadd(s1, s2)    # Resulting legendre series print (res)   | 
[ 3. 7. 11.]
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Code #2 :
# Python program explaining # numpy.legadd() method      # importing numpy as np   # and numpy.polynomial.legendre module as geek  import numpy as np  import numpy.polynomial.legendre as geek     # Legendre series coefficients s1 = (10, 20, 30, 40, 50)  s2 = (2, 4, 6, 8, 10)         # using np.legadd() method  res = geek.legadd(s1, s2)    # Resulting legendre series print (res)   | 
[ 12. 24. 36. 48. 60.]
