Examples
Example #1:
// Make a signal t = 0:0.1:1000; x = 3*sin(t)+8*sin(3*t)+0.5*sin(5*t)+3*rand(t); // Compute the fft y = fft(x, -1); // Invert the result shift = fftshift(y); // Invert the inverted result invShift = ifftshift(shift); // Check that we recreated the original result and(y == invShift) |  |  |
Example #2:
// Make a 2D image t = 0:0.1:30; x = 3*sin(t')*cos(2*t)+8*sin(3*t')*sin(5*t)+.. 0.5*sin(5*t')*sin(5*t)+3*rand(t')*rand(t); // Compute the fft y = fft(x,-1); // Invert the result shift = fftshift(y); // Invert the inverted result invShift = ifftshift(shift); // Check that we recreated the original result and(y == invShift) | | |