Index a cell array with an cell

2021 3 3
1 个回答
更新时间：2021 3 8
6 次查看（30 天）

0 个投票

Hi all
I have a cell array
C {1x2}
C{1} 1x180 values
C{2} 1x1260 values
and B with the same size containing zeros and ones. Now I want to do something:
C{B}=[]; to delete all entries of C where B contains a one whearas if B contains a zero all values should be maintained.
How can i do this?
Thank you!

请先登录，再回答此问题。

回答（1 个）

Jorg Woehl
Jorg Woehl 2021-3-4

0 个投票

Hi Christian,
You can pick the corresponding entries for each of the cells of C as follows:
C{i}(B{i}==0)
The results are then easily combined into a new cell array, as shown in this short example:
C = {[1 2 3], [10 11 12 13 14 15 16]}
B = {[0 1 1], [ 0 1 0 0 1 1 0]}
newC = {C{1}(B{1}==0), C{2}(B{2}==0)}
The newC cell array now contains {[1], [10 12 13 16]}.

4 个评论
显示 2更早的评论 隐藏 2更早的评论

CSCh
CSCh 2021-3-4
Hi Jorg,
thank you for your answer.
With that: C{i}(B{i}==0), your example works. Howerver, for me
i get the following error:
binary operator '==' not implemented for 'cell' by 'scalar' operations.
Maybe it has something to do with my cell structure? here is an abstract from C
C{1}(1:2) =
{
[1,1] =
{
[1,1] = 0.40
}
[2,1] =
{
[1,1] = 0.70
}
}
....
My B is B{1}(1:2)
[1,1] = 0
[1,2] = 0
}
...
Jorg Woehl
Jorg Woehl 2021-3-4
Could you send a command for building (shortened) examples for the cell arrays C and B, like in my code above? Sending the output from
C
B
may also be helpful, as a start.
I am still not sure how your cell arrays are structured; it looks like C may be a 1-by-2 (or 2-by-1?) array of cells, each containing a cell array of scalars... but whatever I tried, I don't get the same error you are referring to. An example would make it clear what we are dealing with.
CSCh
CSCh 2021-3-8
Joerg, many thanks for your effort and your help. I don't know how to create such a cell array. To don't loss so much time, I made a work around with a loop (which I actually wanted to avoid). Thank you
Jorg Woehl
Jorg Woehl 2021-3-8
Sounds good - cell arrays can indeed be tricky to create and work with. Thanks for the follow-up.

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Matrix Indexing 的更多信息

产品

版本

R2020a

标签

提问:

CSCh
CSCh
2021-3-3

评论：

Jorg Woehl
Jorg Woehl
2021-3-8

Community Treasure Hunt

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

Start Hunting!

Translated by