Fftshift python vs matlab

1. Why use Fftshift in Matlab?
2. What does Fftshift do in Python?
3. What is the difference between FFT and Fftshift?
4. How do you use Fftshift and Ifftshift?

Why use Fftshift in Matlab?

command fftshift is used to visualise the FFT within [-Fs/2 Fs/2] instead of [0 Fs] that is the interval that the FFT takes as default.

What does Fftshift do in Python?

Y = fftshift( X ) rearranges a Fourier transform X by shifting the zero-frequency component to the center of the array. If X is a vector, then fftshift swaps the left and right halves of X . If X is a matrix, then fftshift swaps the first quadrant of X with the third, and the second quadrant with the fourth.

What is the difference between FFT and Fftshift?

fft computes the discrete Fourier transform and by definition the output is complex. fftshift doesn't compute anything except swaping the position of the samples, so if your input is real, you get real output.

How do you use Fftshift and Ifftshift?

You can use the fftshift and ifftshift functions to swap left and right halves of a vector. Create a vector containing an odd number of elements, and swap the left and right sides of the vector using the fftshift function. Use the ifftshift function to swap the left and right sides of X .