The “ifftn” function in MATLAB is implemented using a similar approach as the code you provided for “fftn” It performs the inverse Fourier transform on each slice of the input array along the specified dimensions.
Here's an example of how you can implement “ifftn” ,
psi = rand(10, 10, 10);
ifftpsi = ifftn(psi);
[m, n, p] = size(psi);
for k = 1:p
psi(:,:,k) = ifftn(psi(:,:,k));
end
psi = reshape(psi, [m*n p]);
for i = 1:m*n
psi(i,:) = ifft(psi(i,:));
end
psi = reshape(psi, [m n p]);
This code applies the inverse Fourier transform to each slice of “fftpsi” along the third dimension.
You can also refer to the below documentation link if required,
Hope this Helps!
