如何在Matlab中为卷积制作词干图？

Question

I am new to Matlab. I am learning convolution of function. So far I know, generally

Convolution is multiplication of two function, or combining to signal to create a third signal.

Please amend me if I am wrong.

I am given two function which are f(n) and g(n) , in order to find the convolution of f(n)*g(n) , I did the coding like this:

n=-10:10;
w=conv(f,g,'same');
stem(n,w)

Is these the correct method? What should I do if I want to find convolution of f(n)*f(n)*f(n) ?

Answer 1

Convolution is multiplication of signal when signals are taken in frequency domain, not in time domain. For 1-d convolution,

ch=conv(x,y);

stem(ch); works

For 2-d convolution,

ch=conv2(x,y)

use of stem3 would be better. But mesh can also be used.