thx for your kindly response

我看不懂 too... thx

看無XD

i wanna ask if anyone know how to write this kind of program only

你係用matlab黎整program定係用黎analyse野... ?

要計Matrix?

要呀好像.. 邋要用什麼sampling rate, sampling size的.. 我數學特別差啦~

Digitize an Analog signal? z-transform?

yes

but not the z-transform..