Python | Numpy np.chebval() method (original) (raw)

Last Updated : 11 Nov, 2019

With the help of **np.chebval()** method, we can get the array of coefficients after evaluation of x on chebyshev series by using np.chebval() method.

Syntax : np.chebval(x, c)
Return : Return an array after evaluation on x.

Example #1 :
In this example we can see that by using np.chebval() method, we are able to get the array of coefficients by evaluating x on chebyshev series.

import numpy as np

import numpy.polynomial.chebyshev as cheb

gfg = cheb.chebval(( 2 , 5 ), ( 2 , - 4 , 1 ))

print (gfg)

Output :

[ 1. 31.]

Example #2 :

import numpy as np

import numpy.polynomial.chebyshev as cheb

gfg = cheb.chebval(( 1 , 3 , 5 , 7 ), ( 2 , - 4 , 1 , 5 , 1 ))

print (gfg)

Output :

[5.0000e+00 1.0790e+03 7.2570e+03 2.5643e+04]

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