# Python | Numpy np.chebsub () method

Using the `np.chebsub() ` method, we can get the subtraction of two Chebyshev series using ` np.chebsub () `.

Syntax: ` np.chebsub (s1, s2) `
Return: Return an array after subtraction.

Example # 1:
In this example, we can see that using ` np.chebsub () `, we can get the subtraction of two Chebyshev rows using this method.

 ` # NumPy import ` ` import ` ` numpy as np ` ` from ` ` numpy.polynomial ` ` import ` ` chebyshev as C `   ` s1 ` ` = ` ` (` ` 4 ` `, ` ` 6 ` `, ` ` 8 ` `) ```` s2 = ( 3 , 5 , 7 ) # using the np.chebsub () method gfg = C.chebsub (s1, s2 )   print (gfg) ```

Output:

[1., 1., 1.]

Example # 2:

 ` # NumPy import ` ` import ` ` numpy as np ` ` from ` ` numpy.polynomial ` ` import ` ` chebyshev as C `   ` s1 ` ` = ` ` (` ` 4 ` `, ` ` 6 ` `, ` ` 8 ` `, ` ` 1 ` `, ` ` 3 ` `, ` ` 5 ` `) ` ` s2 ` ` = ` ` (` ` 3 ` `, ` ` 5 ` `, ` ` 7 ` `, ` ` 2 ` `, ` ` 4 ` `, ` ` 6 ` `) ` ` # using the np.chebsub () method ` ` gfg ` ` = ` ` C.chebsub (s1, s2) `   ` print ` ` (gfg) `

Output:

[1. 1. 1. -1. -one. -1.]