清空筛选条件
清空筛选条件

Indexing a cell array according to another cell array

2 次查看（过去 30 天）
alicia che
alicia che 2016-3-24
编辑： Andrei Bobrov 2016-4-5
So I have two cell arrays, each represent onset and offset times of events, so they have the same size and they correspond to each other, for example:
A = {[2,3,4],[3,6],[5,7,9,10]};
B = {[2.5,4.2,4.7],[3.2,7.4],[6.2,7.6,9.4,11.3]}
I now was able to delete certain entries in A according to a different indexing vector c,let's say new A is (anything equals to 3 or between 7 to 9 is deleted):
A = {[2,4],[6],[5,10]}
How do I delete the corresponding entries in B? I want to achieve:
B = {[2.5,4.7],[7.4],[6.2,11.3]}
In other words delete the second, first, and second and third entires in the three cells in B. I tried to do it after entries were deleted from A, but the sizes and entries no longer match. It seems I have to somehow index A and B at the beginning before I mess with A, but I am not sure how to do this...

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2016-4-5
编辑：Andrei Bobrov 2016-4-5
n = repelem(1:numel(A),cellfun(@numel,A));
B1 = [B{:}];
A1 = [A{:}];
t = A1 ~= 3 & (A1 < 7 | A1 > 9);
out = accumarray(n(t)',B1(t),[],@(x){x});
or
n = repelem(1:numel(A),cellfun(@numel,A))';
C = [n(:),[A{:}]',[B{:}]'];
C = C(C(:,2) ~= 3 & (C(:,2) < 7 | C(:,2) > 9),:);
[ii,jj] = ndgrid(C(:,1),1:2);
out = accumarray([ii(:),jj(:)],reshape(C(:,2:3),[],1),[],@(x){x});

更多回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2016-3-24
A = {[2,3,4],[3,6],[5,7,9,10]};
B = {[2.5,4.2,4.7],[3.2,7.4],[6.2,7.6,9.4,11.3]}
idx=cellfun(@(x) x~=3 & ~(x<=9 & x>=7),A,'un',0)
C1=cellfun(@(x,y) x(y),A,idx,'un',0)
C2=cellfun(@(x,y) x(y),B,idx,'un',0)
celldisp(C1)
celldisp(C2)
  10 个评论
显示 8更早的评论
alicia che
alicia che 2016-4-5
I was using
A1=cellfun(@(x) x(~ismember(x,find(C))),A,'uni',false)
but it returns the final result I want but not index like your code did, so I can't apply it to B,and not sure how to fix it.
Azzi Abdelmalek
Azzi Abdelmalek 2016-4-5
To make your question clear, post an example and explain clearly what you want, and post the expected result

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Matrix Indexing 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