I am translating a MATLAB code to Python code but I get different results from numpy fft2()
and MATLAB fft2()
. Difference is not small. How can I get same result?
Where S
is (10,10,3)
array
In Python:
Normin1 = fft2(S)
print("Normin is\n",Normin1[:,:,0])
Output(Just first row):
Normin is
[[ 1.29098039e+01+0.00000000e+00j
-8.14368936e-01-4.02146547e-01j
4.57184468e-01+4.59545965e-01j
2.37898348e-01-1.58643666e-01j
-6.89491738e-02+1.65467814e-01j
3.29411765e-01-1.38777878e-17j
-6.89491738e-02-1.65467814e-01j
2.37898348e-01+1.58643666e-01j
4.57184468e-01-4.59545965e-01j
-8.14368936e-01+4.02146547e-01j]
But in MATLAB:
Normin1 = fft2(S);
Output of first row
44.27451 + 0.00000i
-1.04275 - 3.36765i
0.72446 - 1.92128i
0.02706 + 0.09694i
0.70692 + 0.28154i
-0.90980 + 0.00000i
0.70692 - 0.28154i
0.02706 - 0.09694i
0.72446 + 1.92128i
-1.04275 + 3.36765i
I solved my problem. Python does array operations row-wise. In contrast, Matlab/Octave does array operations column-wise. That why, it should be as follows to get same result,
MATLAB code:
Normin1 = fft2(S);
Python equivalent:
Normin1 = np.fft2(S.T).T
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