Python | Numpy np.legmul() method

np.legmul() method is used to multiply one Legendre series to another.It returns the product of two Legendre series c1 * c2.

Syntax : np.legmul(c1, c2)
Parameters:
c1, c2 :[ array_like ] 1-D arrays of Legendre series coefficients ordered from low to high.

Return : [ndarray] Legendre series coefficients representing their product.

Code #1 :

# Python program explaining
# numpy.legmul() 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 = (2, 4, 8)
s2 = (1, 3, 5)

# using np.legmul() method
res = geek.legmul(s1, s2)

# Resulting Legendre series
print (res)

Output:

[ 14.          27.6         37.42857143  26.4         20.57142857]

Code #2 :

# Python program explaining
# numpy.legmul() 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.legmul() method
res = geek.legmul(s1, s2)

# Resulting Legendre series
print (res)

Output:

[ 183.93650794  451.80952381  666.43578644  755.23232323  786.997003
  626.61782662  512.26551227  326.34032634  190.36519037]