Dft matlab example

1. What is DFT explain with example?
2. How do you code DFT?

What is DFT explain with example?

the DFT spectrum is periodic with period N (which is expected, since the DTFT spectrum is periodic as well, but with period 2π). Example: DFT of a rectangular pulse: x(n) = 1, 0 ≤ n ≤ (N − 1), 0, otherwise.

How do you code DFT?

Then the basic DFT is given by the following formula: X(k)=n−1∑t=0x(t)e−2πitk/n. The interpretation is that the vector x represents the signal level at various points in time, and the vector X represents the signal level at various frequencies.