function r = my_conv(a,b) % 存为 my_conv.m
wa = length(a);
wb = length(b);
r = zeros(1,wa+wb-1);
for k = 1:wa
c = a(k)*b;
d = r(1,k:k+wb-1);
d = d+c;
r(1,k:k+wb-1) = d;
end
% 验证
a = 1:3;
b = 1:5;
r = my_conv(a,b)
r =
1 4 10 16 22 22 15
conv(a,b)
ans =
1 4 10 16 22 22 15
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