Searching and Manipulating Cell Array
1 view (last 30 days)
Show older comments
I have a cell array A:
[3,2]
[2,4]
[4,5]
[2,5]
[6]
and cell array B:
[2,3,4]
[2,5]
[4,5,6]
In the array B I can see that [2,3,4] is made of union of [3,2] and [2,4] from A. [2,5] in B is made from union of only [2,5] from A. [4,5,6] in B is made of [4,5] and [6] in A.
So, I want to find the index of elements in A union of which make each array element of B. How do I do this?
Thanks guys
2 Comments
Azzi Abdelmalek
on 19 Oct 2012
what are the sizes of elments in B? can they be >3. The same question about A
Accepted Answer
Matt J
on 19 Oct 2012
Edited: Matt J
on 19 Oct 2012
subsetmap=false(length(A), length(B));
for bb=1:length(B)
for aa=1:length(A)
subsetmap(aa,bb) = all(ismember(A{aa},B{bb}));
end
end
%this next line is unnecessary if logical indexing is sufficient
indices=arrayfun(@(col) find(subsetmap(:,col)),1:length(B),'uni',0);
3 Comments
Matt J
on 19 Oct 2012
By the way. My code doesn't check to see whether all B{i} can actually be formed from the union of some A{j}. It only works if this is already the case. I leave it to you to add the appropriate error checks.
More Answers (0)
See Also
Categories
Find more on Matrices and Arrays in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!