With the help of scipy.fft.dct() method, we can compute the discrete cosine transform by selecting different types of sequences and return the transformed array by using this method.
Syntax :
scipy.fft.dct(x, type=2)
Return value: It will return the transformed array.
Example #1: In this example, we can see that by using scipy.fft.dct() method, we are able to get the discrete cosine transform by selecting different types of sequences by default it’s 2.
Python3
# import scipy from scipy import fft # Using scipy.fft.dct() method gfg = fft.dct([1, 2, 3, 4]) print(gfg) |
Output :
[20.00000000 -6.30864406 0.00000000 -0.44834153]
Example #2 :
Python3
# import scipy from scipy import fft # Using scipy.fft.dct() method gfg = fft.dct([-6, 5, -4, 3, -2, 1], 3) print(gfg) |
Output :
[ -0.50866619 -0.58578644 -0.79439535 -1.34919819 -3.41421356 -29.34774027]
