np.polyfromroots() method is used to generate a polynomial series with given roots.
Syntax :
np.polyfromroots(roots)
Parameters:
roots :[array_like] Input sequence containing the roots.Return : [ndarray] 1-D array of coefficients of polynomial series.
Code #1 :
# Python program explaining # numpy.polyfromroots() method # importing numpy as np # and numpy.polynomial.polynomial module as geek import numpy as np import numpy.polynomial.polynomial as geek # Input roots roots = (2, 4, 8) # using np.polyfromroots() method res = geek.polyfromroots(roots) # Resulting polynomial series coefficient print (res) |
Output:
[-64. 56. -14. 1.]
Code #2 :
# Python program explaining # numpy.polyfromroots() method # importing numpy as np # and numpy.polynomial.polynomial module as geek import numpy as np import numpy.polynomial.polynomial as geek # Input roots s = (1, 2, 3, 4, 5) # using np.polyfromroots() method res = geek.polyfromroots(s) # Resulting polynomial series coefficient print (res) |
Output:
[-120. 274. -225. 85. -15. 1.]
