MATLAB Answers

find values in vector present in cell array

2 views (last 30 days)
Elysi Cochin
Elysi Cochin on 17 Mar 2020
Edited: Andrei Bobrov on 17 Mar 2020
i have a cell array cA and vector V with values
cA = {[11,21,3;14,5,63], [11,22], [33;95;66;7]};
V = [14 22 33 66];
i wanted to find which all values in V are there in cA and its position
output = { [ 0 0 0 1 0 0], [1 2], [3 0 4 0] }

  0 Comments

Sign in to comment.

Accepted Answer

Andrei Bobrov
Andrei Bobrov on 17 Mar 2020
Edited: Andrei Bobrov on 17 Mar 2020
out = cell(size(cA));
for i = 1:numel(out)
x = cA{i}';
[~,out{i}] = ismember(x(:)',V);
end
or with cellfun
[~,out] = cellfun(@(x)ismember(reshape(x',1,[]),V),cA,'un',0);

  0 Comments

Sign in to comment.

More Answers (1)

Ahmed Anas
Ahmed Anas on 17 Mar 2020
Dear, Always use matrix instead of cell arrays, working with matrix is really easy as compared to cell arrays. In the code below, i have split cA matrix into three small matrices and then checked the entities which are present in vector V. Afterwards compile the entire output matrix.
%%Splitting cA matrix into three consistent matrices
cA1 = [11,21,3;14,5,63]
cA2 = [11,22]
cA3 = [33;95;66;7]
V = [14 22 33 66];
%%Checking for entities of cA1
[Lia,Locb1] = ismember(cA1,V)
reshape(Locb1,1,[])
transpose(Locb1)
Locb1.'
Locb1(:)
Locb1=reshape(Locb1.',1,[])
%%Checking for entities of cA2
[Lia,Locb2] = ismember(cA2,V)
Locb2=reshape(Locb2,1,[])
%%Checking for entities of cA3
[Lia,Locb3] = ismember(cA3,V)
Locb3=reshape(Locb3,1,[])
Output=cell2mat({Locb1,Locb2,Locb3})

  2 Comments

Elysi Cochin
Elysi Cochin on 17 Mar 2020
the dimension of cell array changes. so how to keep the code unaltered for any dimension
sometimes
cA = {[11,22,3;44], [14,22]};
V = [14 22 33 66];
output = { [ 0 2 0 0 ], [1 2] }
Ahmed Anas
Ahmed Anas on 17 Mar 2020
I am unable to understand [11 22 3;44] in cA = {[11,22,3;44], [14,22]};
Its dimensions should be consistent

Sign in to comment.

Community Treasure Hunt

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

Start Hunting!