Python | Numpy np.chebvander2d() method
With the help of np.chebvander2d() method, we can get the Pseudo-Vandermonde 2D matrix from given array having degree which is passed as parameter by using np.chebvander2d() method.
Syntax :
np.chebvander2d(x, y, degree)
Return : Return the 2D matrix having size i.e array.size + (degree + 1).
Example #1 :
In this example we can see that by using np.chebvander2d() method, we are able to get the pseudo-vandermonde 2D matrix using this method.
# import numpy import numpy as np import numpy.polynomial.chebyshev as cheb # using np.chebvander2d() method gfg = cheb.chebvander2d((2, 4, 8, 1), (2, 4, 8, 1), 2) print(gfg) |
Output :
[[ 1. 2. 7.] [ 1. 4. 31.] [ 1. 8. 127.] [ 1. 1. 1.]]
Example #2 :
# import numpy import numpy as np import numpy.polynomial.chebyshev as cheb # using np.chebvander2d() method gfg = cheb.chebvander2d((3, 5, 1, 10), (3, 5, 1, 10), 4) print(gfg) |
Output :
[[1.0000e+00 3.0000e+00 1.7000e+01 9.9000e+01 5.7700e+02] [1.0000e+00 5.0000e+00 4.9000e+01 4.8500e+02 4.8010e+03] [1.0000e+00 1.0000e+00 1.0000e+00 1.0000e+00 1.0000e+00] [1.0000e+00 1.0000e+01 1.9900e+02 3.9700e+03 7.9201e+04]]
