matlab DTFT

DTFT stands for Discrete Time Fourier Transform. It is a mathematical technique used in signal processing to analyze and transform discrete-time signals from the time domain to the frequency domain.

In MATLAB, the DTFT of a signal can be calculated using the fft function. Here is an example code:

% Generate a discrete-time signal
x = [1 2 3 4];

% Calculate the DTFT using fft function
X = fft(x);

% Plot the magnitude of the DTFT
stem(abs(X));
xlabel('Frequency');
ylabel('Magnitude');
title('DTFT of x');

This code generates a discrete-time signal x, calculates its DTFT using fft function, and plots the magnitude of the DTFT using the stem function. The resulting plot shows the frequency components of the signal x in the frequency domain.