Indexing n cell elements at a time

Hi all,

I have a 1x100 cell (comprised of 2x500 doubles) and am trying to index through it 4 cells at a time. What I mean is that I would like to index cells 1-4, 9-12, then 17-20 and so on. Im having a bit of a hard time with this and would appreciate and comments or suggestions. Thank you!

An example:

for j = 1:4:100  % Index through 1x100 cell
      for k = 1:4 
          temp{k}(1,:) = values{k}(1,:);    
      end
end

I will be editing this as I work on it! Thanks again!

EDIT: I found an answer to a similar question that proposed this:

idx = setdiff(2:10000,5:4:10000);
for ii = idx
  disp(ii)
end

Again, the issue I run to here is that I can specify to skip every nth element but not a group of elements (i.e. 4 elements at a time).

Answer 1

[James Tursa]

E.g., is this the type of indexing you want?

for j = 1:4:100  % Index through 1x100 cell
    temp = values(j:j+3); % Pick off the 4 cells
    for k = 1:4 
        % Use temp{k} here
    end
end

[R J]

Thank you! This was very helpful and works. Another solution I came across was this (thanks to the cyclist):

idx = bsxfun(@plus,[0 1 2 3]',1:8:100)
for ii = idx(:)
  % Do stuff
end