is not equal in cellarray

how to make a not equal if statement in cellarray?

I tried this one:

for i=1:length(levelxxx)
  if ~isequal(levelxxx{i},level1_root)
     levelxxx(i,:)=[];

      end
   end

but it is not working!!

[Jan]

Whenever you write "is not working" in a forum, it is useful and recommended to explain, what actually happens: do you get an error message (if so, post a complete copy of the message) or do the results differ from your expectations?

[Jwana]

the error mesage is: Index exceeds matrix dimensions.

Answer 1

[Matt J]

Maybe this?

idx = ismember(levelxxx(:,1),level1_root,'rows');

levelxxx= levelxxx(idx,:);

[Jwana]

error message : Index exceeds matrix dimensions.

[Matt J]

Works fine for me:

    >> levelxxx={'111','zz';'222','abgh';'111','hyur'}; level1_root='111';

    >> idx = ismember(levelxxx(:,1),level1_root); levelxxx= levelxxx(idx,:)

    levelxxx = 

        '111'    'zz'  
        '111'    'hyur'

Answer 2

[Azzi Abdelmalek]

when the condition is true :

levelxxx(i,:)=[];

then the size of levelxxx will be reduced!

use

v_temp=levelxxx
for i=1:length(v_temp)
   if ~isequal(v_temp{i},level1_root)
     levelxxx(i,:)=[];
   end
end

[Jan]

Reducing the size of an array repeatedly causes the same troubles than a repeated growing: The need to re-allocate the new arrays wastes a lot of time. Better:

index = true(size(levelxxx));  % Pre-allocate
for ii = 1:length(v_temp)      % avoid "i" as name of a variable
  index(ii) = isequal(levelxxx{ii}, level1_root);
end
levelxxx = levelxxx(index, :);

[Jwana]

Thank you for your responses, how ever ;it gives error message : Matrix index is out of range for deletion.

[Azzi Abdelmalek]

I did a big mistake, try Simon's code. And post a sample of your data