清空筛选条件
清空筛选条件

how to exclude a row from a matrix

28 次查看（过去 30 天）
D.J
D.J 2018-10-3
评论： D.J 2018-10-3
Hi all, I need to extract all data from a matrix except for one row (the 3rd from last).
Say for example I have the matrix below and I want to exclude this row: [NAN,7,7] Any idea how to do that? Many thanks
T=[1,2,3;4,5,6;7,8,9;1,2,3;4,5,6;7,8,9; NAN,7,7;4,5,6;7,8,9]
  1 个评论
Bob Thompson
Bob Thompson 2018-10-3
I would suggest using an isnan check. Not entirely sure how it will treat an entire row, but a place to start.
T=[1,2,3;4,5,6;7,8,9;1,2,3;4,5,6;7,8,9; NAN,7,7;4,5,6;7,8,9];
T = T(~isnan(T),:);
I suspect you will need:
T = T(~isnan(T(:,1)),:);

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

the cyclist
the cyclist 2018-10-3
Assuming that what you want is to exclude any row with a NaN in any position, then either
T = T(all(~isnan(T),2),:);
or
T(any(isnan(T),2),:) = [];
will do the job.
  1 个评论
D.J
D.J 2018-10-3
There was a problem with the first option, but the 2nd one worked perfectly well. Thank you very much.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Logical 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