# Python | Numpy np.legdomain() method

With the help of `np.legdomain()` method, we can get the filter having value array([-1, 1]) in legendre series.

Syntax : `np.legdomain`
Return : Return filter of array([-1, 1])

Example #1 :

 `# Python program explaining ` `# numpy.legdomain() method  ` ` `  `# import numpy and legdomain ` `import` `numpy as np ` `from` `numpy.polynomial.legendre ``import` `legdomain ` ` `  `# using np.legdomain() method ` `for` `i ``in` `range``(``5``): ` `    ``ans ``=` `legdomain ``+` `[i, i ``+` `1``] ` `    ``print``(ans) `

Output :

[-1 2]
[0 3]
[1 4]
[2 5]
[3 6]

Example #2 :

 `# Python program explaining ` `# numpy.legdomain() method  ` ` `  `# import numpy and legdomain ` `import` `numpy as np ` `from` `numpy.polynomial.legendre ``import` `legdomain ` ` `  `# using np.legdomain() method ` `for` `i ``in` `range``(``4``): ` `    ``ans ``=` `legdomain ``+` `[i``-``1``, i ``+` `1``] ` `    ``print``(ans) `

Output :

[-2 2]
[-1 3]
[0 4]
[1 5]

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