Logical index multiple columns

12 次查看（过去 30 天）
Rainer Danner
Rainer Danner 2019-12-17
编辑： Ridwan Alam 2019-12-17
We have a 111x1402 array A with one or no logical true for each column.
E.g.:
0 0 1 0 ...
1 0 0 0
0 1 0 1
.
.
.
Now we want to get the values for each of the 1402 columns from another array B which is 111x2.
Meaning the row of the 111 where there is a logical true in array A.
E.g.:
500 142
450 -12
305 125
. .
. .
. .
How can we achieve this in Matlab?
  3 个评论
显示 1更早的评论
Adam Danz
Adam Danz 2019-12-17
You lost me at , "Now we want to get the values for each of the 1402 columns from another array B which is 111x2." Does array B have 2 or 1402 columns? By "get the values" do you mean the row number of the 1-and-only TRUE in each column?
Rainer Danner
Rainer Danner 2019-12-17
编辑：Rainer Danner 2019-12-17
B has 111 rows and 2 columns
Get the values = get the values of the 2 columns of B (e.g 500 and 142)
We tried:
cellCenters(bestConn(:, :), :)
Gives the following error:
The logical indices in position 1 contain a true value outside of the array bounds.
cellCenters(bestConn(:, 1), :)
Is working as expected but only returns the values for one and not all...

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Ridwan Alam
Ridwan Alam 2019-12-17
编辑：Ridwan Alam 2019-12-17
I believe you are trying to find the row-indices of A, where the row contains a 1, and then extract those rows from B. In that case, this should help:
B(any(A,2),:)

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Matrices and Arrays 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