# Python | Numpy np.legfromroots() method

`np.legfromroots()` method is used to generate a legendre series with given roots.

Syntax : `np.legfromroots(roots)`
Parameters:
roots :[array_like] Input sequence containing the roots.

Return : [ndarray] 1-D array of coefficients of legendre series.

Code #1 :

 `# Python program explaining ` `# numpy.legfromroots() method  ` `   `  `# importing numpy as np   ` `# and numpy.polynomial.legendre module as geek  ` `import` `numpy as np  ` `import` `numpy.polynomial.legendre as geek ` `   `  `# Input roots ` ` `  `roots ``=` `(``2``, ``4``, ``8``)  ` `    `  `# using np.legfromroots() method  ` `res ``=` `geek.legfromroots(roots)  ` ` `  `# Resulting legendre series coefficient ` `print` `(res)  `

Output:

```[-68.66666667  56.6         -9.33333333   0.4       ]

```

Code #2 :

 `# Python program explaining ` `# numpy.legfromroots() method  ` `   `  `# importing numpy as np   ` `# and numpy.polynomial.legendre module as geek  ` `import` `numpy as np  ` `import` `numpy.polynomial.legendre as geek ` `   `  `# Input roots ` `s ``=` `(``1``, ``2``, ``3``, ``4``, ``5``)  ` ` `  `   `  `# using np.legfromroots() method  ` `res ``=` `geek.legfromroots(s)  ` ` `  `# Resulting legendre series coefficient ` `print` `(res)  `

Output:

```[ -1.98000000e+02   3.25428571e+02  -1.58571429e+02   3.44444444e+01
-3.42857143e+00   1.26984127e-01]

```

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