Suppose I have this B = [1 4 7 10; 2 5 8 11;3 6 9 12] 1 4 7 10 2 5 8 11 3 6 9 12 And I want to check through each column for a value of 2. How would I do this?

Indexing through an array

3 次查看（过去 30 天）

显示更早的评论

Elizabeth Scharre 2021-3-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/761956-indexing-through-an-array

评论： James Tursa 2021-3-3

在 MATLAB Online 中打开

Suppose I have this

B = [1 4 7 10; 2 5 8 11;3 6 9 12]
 4   7   10
 5   8   11
 6   9   12

And I want to check through each column for a value of 2. How would I do this?

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

James Tursa 2021-3-3

What do you want as a result? A logical array indicating which columns have a 2 in them? An outline for a for-loop that checks for a 2 in a column? Or ...?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson 2021-3-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/761956-indexing-through-an-array#answer_638376

在 MATLAB Online 中打开

B = [1 4 7 10; 2 5 8 11;3 6 9 12]
B = 3×4
     1     4     7    10
     2     5     8    11
     3     6     9    12
any(B==2,1)
ans = 1x4 logical array
   1   0   0   0