清空筛选条件
清空筛选条件

How to delete columns of a matrix that have fewer than 3 non-zero elements

3 次查看（过去 30 天）
osminbas
osminbas 2012-3-1
Hello,
How can I delete columns of a matrix that have fewer than 3 non-zero elements? Thank you!
  4 个评论
显示 2更早的评论
osminbas
osminbas 2012-3-1
I can define it as matrix A is 5x5. Say two columns (column 1 and 3) have only 2 non-zero elements.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Wayne King
Wayne King 2012-3-1
Hi, I'm sure this isn't the most efficient way:
x =[
5 0 1 4 1
3 0 0 2 1
1 0 2 2 4
4 3 0 2 3
4 2 0 1 3];
for nn =1:size(x,2)
numz(nn) = length(find(x(:,nn)==0));
end
x(:,numz>2) = [];

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

Community Treasure Hunt

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

Start Hunting!

Translated by