Accessing a Matrix through an indices vector

2011 2 15
1 个回答
回答已采纳
5 次查看（30 天）

0 个投票

I have a linear vector of dimensional indices (A) and would like to access a single element from matrix M using this vector.
e.g.
A = [3,5,6];
FUNC(m,A); // equivalent to m(3,5,6);
Is there a method in MATLAB that replaces FUNC that allows this?

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2011-2-15

0 个投票

EDIT: fixed per Oleg's catch of my mistake:
t = num2cell(A);
m(t{:})
Or if you prefer one-line answers better:
subsref(m, struct('type', repmat({'()'},1,length(A)), ...
'value', num2cell(A)))

2 个评论
显示 无 隐藏 无

Oleg Komarov
Oleg Komarov 2011-2-15
I think in the first case:
A = [3,5,6];
B = rand(10,10,10);
idx = num2cell(A);
B(idx{:})
Dukwhan
Dukwhan 2011-2-15
Yes, Oleg's version works well. Thank you both!

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Mathematics and Optimization 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