Assign a value to a matrix element defined as a variable

2023 6 17
2 个回答
回答已采纳
更新时间：2023 6 17
4 次查看（30 天）
Ran in:

0 个投票

Ran in:
Hi all,
Is it possible to assign values (variables) to elements in a matrix that is defined as a function handle?
For example:
prop1 = zeros(2);
prop1(:,1) = 1;
prop1(:,2) = 2;
prop1
prop1 = 2×2
1 2 1 2
prop2 = @(x) [0 0;
0 0]
prop2 = function_handle with value:
@(x)[0,0;0,0]
prop2(:,2) = @(x) x(2)
Nonscalar arrays of function handles are not allowed; use cell arrays instead.
I would like to assign variables to prop2 as I did to prop1.

2 个评论
显示 无 隐藏 无

Geovane Gomes
Geovane Gomes 2023-6-17
编辑：Geovane Gomes 2023-6-17
Is it possible to write the following function handle with less effort? Maybe with a couple of code lines.
prop = @(x) [x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(1) x(3) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0;
x(2) x(4) 0 0];

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Torsten
Torsten 2023-6-17
移动：Torsten 2023-6-17
Ran in:

1 个投票

Ran in:
prop = @(x)[[x(1)*ones(11,1);x(2)*ones(12,1)],[x(3)*ones(11,1);x(4)*ones(12,1)],zeros(23,1),zeros(23,1)];
prop([1 2 3 4])
ans = 23×4
1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0 1 3 0 0

更多回答（1 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Data Type Conversion 的更多信息

产品

版本

R2023a

标签

Community Treasure Hunt

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

Start Hunting!

Translated by