fft of vector row

hi everyone , can u help me to implement this algorithm

Answer 1

[Star Strider]

The fft function can calculate the Fourier transform across any dimensions you choose. I do not understand the notation in that image, so this is something of a guess.

To calculate the Fourier transform of ‘x’ down the columns:

X1 = fft(x);

and across the rows:

X2 = fft(x,[],2);

then do the same thing to take the mean values of the magnitudes:

Xc = mean(abs(X1));
Xr = mean(abs(X2),2);

That should do what you want.

MATLAB dimension conventions can be a bit confusing when first encountered.