Append nested cells in a loop

I am trying to store nested cells in a loop, but can't figure it out. I'm pretty sure this is almost trivial, but it's escaping me. See code below for further explanation.

for i = 1:length(ccp)
    for j = 1:length(cct)
        if isempty(tsrx{i,j})==0 % tsrx has many empty cells and I'm trying to collect the non-empty 
            % ones here. Since I'm only proceeding with non-empty ones, I'm losing the j counter. 
            % What I'd like is, for each i, a cell like this: 
            % {{first non-empty j},{second non-empty j}{third non-empty j}...}, so each tsrbetapairs{i}
            % has nested cells for each valid result of the if loop
            tsrbetapairs{i} = {tsrx{i,j};betax{i,j};i;j};
        end
    end
end

I've a tried a few things, but none worked. I either get a bunch of empty cells or for each tsrbetapairs{i} I only get that last non-empty j.

[KSSV]

You want the indices which are empty ?

[Daniel]

No. I want the non-empty ones. I want this result, for example:

tsrbetapairs{1} = {{[tsrx{1,1};betax{1,1};1;1]},{[tsrx{1,3};betax{1,3};1;3]}}

where tsrx{1,2} was empty and so it was skipped. This could be different for every i.

Answer 1

[Daniel]

Figured it out. This works, though I'm open to other suggestions.

count = 1;
for i = 1:length(ccp)
    for j = 1:length(cct)
        if isempty(tsrx{i,j})==0
            tsrbetapairs{i}{count} = [tsrx{i,j};betax{i,j};i;j];
            count = count+1;
        end
    end
    count = 1;
end