i want write the next function by matlab ?

2016 12 22
1 个回答
更新时间：2016 12 22
8 次查看（30 天）

0 个投票

2 个评论
显示 无 隐藏 无

John D'Errico
John D'Errico 2016-12-22
It is time for you to learn to use loops. Here a for loop is simple and reasonable.
mohammed elmenshawy
mohammed elmenshawy 2016-12-22
i write the following and displayed the error
. what to do ?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2016-12-22

0 个投票

You syms Z but what is z (lower-case) ? Is it a function or is it a vector?
It is not possible to use a symbolic expression to index an array. If you have a finite vector to sum symbolically, then construct all elements of the vector and then sum() them. Constructing the elements of the vector is sometimes possible using vectorization.
t = 4:n;
L = sum((z(t) - null1 .* z(t-1) - null2 .* z(t-2) + theta .* alpha(t-1)).^2) ./ (2 .* sigma.^2);

类别

在 帮助中心 和 File Exchange 中查找有关 Symbolic Math Toolbox 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