How to keep the values for particular dimension of a matrix and rest of the dimension will be zeros?

2 次查看（过去 30 天）
AS
AS 2023-9-27
评论： AS 2023-9-29
I have a matrix A with dimension 496 by 48. I want to keep the values with dimension A(350:400, 20:35) as it is and rest of the dimension of A will be zeros.

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2023-9-27
Easy way:
B = zeros(size(A), 'like', A);
B(350:400,20:35) = A(350:400,20:35);
Now B is A with all the other elements zeroed.
A different approach:
mask = true(size(A));
mask(350:400,20:35) = false;
A(mask) = 0;
A third approach:
A(1:349,:) = 0; A(401:end,:) = 0;
A(:,1:19) = 0; A(:,36:end) = 0;

更多回答（1 个）

Bruno Luong
Bruno Luong 2023-9-27
A single line solution
A(~(ismember(1:size(A,2),350:400) & ismember((1:size(A,1))',20:35))) = 0

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Decomposition 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