Make specific columns of a matrix zero.

17 次查看（过去 30 天）
Santos García Rosado
评论： Santos García Rosado 2021-3-4
Hi Mathworks community!
So I have a matrix A such as:
A = [1,2,3,4,5,6,7,8,9; 5,8,6,44,8,6,8,7,3; 9,8,7,6,5,4,3,2,1]
And an array b that specifies the columns I' DON´T want to make zero:
b = [1,4,5,9]
Getting an output such as:
out = [1,0,0,4,5,0,0,0,9; 5,0,0,44,8,0,0,0,3; 9,0,0,6,5,0,0,0,1]
I'm working with much bigger dimensions so, Any ideas of how to do this efficiently?
Thank you!
Santos

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2021-3-4
Ran in:
A = [1,2,3,4,5,6,7,8,9; 5,8,6,44,8,6,8,7,3; 9,8,7,6,5,4,3,2,1];
b = [1,4,5,9];
out = zeros(size(A));
out(:,b) = A(:,b)
out = 3×9
1 0 0 4 5 0 0 0 9 5 0 0 44 8 0 0 0 3 9 0 0 6 5 0 0 0 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

R2020b

Community Treasure Hunt

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

Start Hunting!

Translated by