MATLAB: Using accumarry and changing size of output

accumarrayvarying output size over iterations

I am using the accumarray by using the following command on the first and second column of struct array. The first part of the code works good.
but the last two commands "went_from_to_countAge" and "went_from_to_probAge", does not work. any idea?
sequence = [1 1 1 1 2 2 2 2 2 3;...
            1 1 1 1 1 1 1 1 1 1;...
            1 1 1 1 1 1 1 1 1 1;...
            1 1 1 1 1 1 1 2 2 2;...
            1 1 1 1 1 1 1 1 1 1;...
            2 2 2 2 2 2 2 2 2 2; ...
            2 2 2 2 2 2 2 3 3 3; ...
            2 3 3 3 3 3 2 2 2 2; ...
            2 2 2 2 2 2 4 4 4 4]
% first part of the code 
k = 1:size(sequence)
Age (k) = 25 + k
States = unique([sequence(:,k); sequence(:,k+1)]); % Find the unique rows based on the data in the first two columns. 
[TF, fromstateAge] = ismember(sequence(:,k), States); % logical arrays 
[TF, tostateAge] = ismember(sequence(:,k+1), States);
% second part of the code 
went_from_to_countAge(:,k) = accumarray( [fromstateAge(:), tostateAge(:)], 1, []) % frequency of each unique number 
went_from_to_probAge(k)= went_from_to_countAge ./ sum(went_from_to_countAge); % pribability of each unique number

Best Answer

I am not clear if you are saying that you want different sizes to be returned? If so then you either need to use a cell array or else you have to pack the results into a larger array with padding.
If instead the point is that the size returned is sort of by chance but you want a fixed size, then change the place you used [] to give the required output size, such as
A = accumarray( [data(1).fromstate(:,2), data(1).tostate(:,3)], 1, [5 5]);