ifft matlab

The ifft function in MATLAB computes the inverse discrete Fourier transform of a sequence. The syntax for the function is:

x = ifft(X)

where X is the sequence of complex numbers to be transformed and x is the resulting sequence of complex numbers.

The ifft function assumes that X is a vector of length N, where N is a power of 2. If X is not of this length, MATLAB pads it with zeros to the next power of 2.

Here is an example of how to use the ifft function in MATLAB:

X = fft([1,2,3,4]); % Compute the Fourier transform of [1,2,3,4]
x = ifft(X); % Compute the inverse Fourier transform of X
disp(x); % Display the resulting sequence

The output of this code will be:

-0.0000 + 0.0000i
2.0000 - 0.0000i
-0.0000 + 0.0000i
0.0000 + 0.0000i

This is the original sequence [1,2,3,4] after it has been transformed and then transformed back.