How to get a sum of a series

2 次查看（过去 30 天）
dav
dav 2014-2-20
回答： Muruganandham Subramanian 2014-2-20
Hello,
I need to get the sum of
Y(t)= A(i)*X(t-i)
where X is a vector of size (100,1). A is a vector of size (3,1)
i=0 to 2 and t= 3 to 100.
Any help is greatly appreciated.
Thanks
Dav

请先登录，再回答此问题。

采纳的回答

kjetil87
kjetil87 2014-2-20
t = 3:100;
sumY=0;
for i=0:2
sumY = sumY+sum(A(1+i)*X(t-i)) ;
end
like this?

更多回答（2 个）

Muruganandham Subramanian
Try using 'cumsum' command
David Young
David Young 2014-2-20
编辑：David Young 2014-2-20
If you want the sum over i for each t, then it's
Y = conv(X, A, 'valid');

类别

在 Help Center 和 File Exchange 中查找有关 Particle & Nuclear Physics 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