I wanna show DTFT result and convolution result in f-domain are same.
Additionally, I wanna show sampled function and inverse fourier transform result are same too.
How can I show this? If I use just FFT or DFT, they don't show picture-like. If I have to use other function (e.g diric, freqz, etc), then please let me know how can I use, and input value mean.