Program code for convolution

I want program for convolution

Answer 1

[Chunru]

u = [1 2 3 1]; v = [2 3];
conv(u, v)

ans = 1×5

2 7 12 11 3

% filter(u, 1, v)

Answer 2

[Walter Roberson]

nlfilter() a function that converts to double, does element-wise multiplication, and sums.