How to add sparse matrix to an n*n matrix

2 次查看（过去 30 天）
SALMAN KHAN
SALMAN KHAN 2022-3-5
评论： SALMAN KHAN 2022-3-5
Let say;
A = ones(4,4);
i = [2 4]; j = [1,3];
B = sparse(i,j,[9 9]);
A + B;
How can I add A+B, so that the component A(2,1) = 1+9 and A(4,3) = 1+9. Rest of the components of matrix A should be 1. I am trying the above snippet but it outputs error: Error using +
Please help me if its possible to add accordingly, Thanks.

请先登录，再回答此问题。

采纳的回答

KSSV
KSSV 2022-3-5
Ran in:
To add A and B, they should be of same dimension. In your case A is 4x4 matrix whereas B is not. So to add them, you have to make B to the same size of A.
A = ones(4,4);
i = [2 4]; j = [1,3];
B = sparse(i,j,[9 9],4,4) ;
iwant = A + B
iwant = 4×4
1 1 1 1 10 1 1 1 1 1 1 1 1 1 10 1

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

产品


版本

R2021b

Community Treasure Hunt

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

Start Hunting!

Translated by