Count the number of non-zero elements of a column/row of a 2D-Matrix?

82 次查看（过去 30 天）
Ines
Ines 2012-5-3
编辑： Souarv De 2023-5-23
Hello everyone,
I have a 2D Matrix and I want to make Matlab count the number of non-zero Elements within one row, is there a straightforward way to do this? Many thanks

请先登录，再回答此问题。

采纳的回答

James Tursa
James Tursa 2012-5-3
sum(X(row_number,:)~=0)

更多回答（2 个）

Thomas
Thomas 2012-5-3
Try:
a=[3 0 0;0 2 0; 1 0 4] %input matrix
sum(a~=0,2) % no. of nozero elements in each row
Muhammad Ilias Amin
a = [3 0 0; 0 2 0; 1 0 0];
To get the no of non zero columns: sum( all( a == 0, 1 ) );
To get the no of non zero rows: sum( all( a == 0, 2 ) );
  1 个评论
Souarv De
Souarv De 2023-5-23
编辑：Souarv De 2023-5-23
A small correction in the text part to the above two lines code is that it will give no of zero columns and rows, not non-zero columns and non-zero rows.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Loops and Conditional Statements 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