清空筛选条件
清空筛选条件

Multiply and shift ?

1 次查看（过去 30 天）
Willim
Willim 2019-3-29
编辑： Catalytic 2019-3-30
I would like to have a code that can generate the maltiplication for x after shifting them many time
x=[1 2 4 1 3 4 5 1 3]
I would like to have a loop that can generate the autocorrlation for x with itself.
to illustrate;
x*x
R(1)=sum([1 2 4 1 3 4 5 1 3]*[1 2 4 1 3 4 5 1 3])/Length(x)
R(2)=sum([ 2 4 1 3 4 5 1 3]*[1 2 4 1 3 4 5 1 ])/Length(x-1)
and so forth until the R(N) computed

请先登录，再回答此问题。

回答（1 个）

Catalytic
Catalytic 2019-3-29
编辑：Catalytic 2019-3-29
R = ifftshift(xcorr(x,'unbiased'))
  3 个评论
显示 1更早的评论
Willim
Willim 2019-3-30
The results for the both codes you provide are not same
Catalytic
Catalytic 2019-3-30
编辑：Catalytic 2019-3-30
The differences I see are super-small.
x=[1 2 4 1 3 4 5 1 3];
e=ones(size(x));
R1 = ifftshift(xcorr(x,'unbiased'));
R2=ifftshift( conv(x,flip(x))./conv(e,e) );
>> difference=max(abs((R1-R2)))
difference =
3.5527e-15

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Calculus 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by