How to add together values in matrix and replace the empty spaces with zeroes

I have used a code that was written in someone elses previous question, that adds together all values over 0, after each zero.

So if you had : [0 0 0 2 3 4 0 0 0 5 2 1], you would get [9 8]

However, what i would want is this [ 0 0 0 0 0 9 0 0 0 0 0 8]

So basically replacing the “open” spaces with a 0

Anyone know how i can achieve this?

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hello

try this :

T = [0 0 0 2 3 4 0 0 0 5 2 1];   % input data
T_out = zeros(size(T));
% find start and end indexes of groups of zeroes
id_nonzero = (T>eps);  
[begin,ends] = find_start_end_group(id_nonzero);
% loop over this groupes
for k = 1:numel(begin)
    start = begin(k);  % start index of k th groups of non zero values
    stop = ends(k);  % end index of k th groups of non zero values
    T_out(stop) = sum(T(start:stop));
end
T

T = 1×12
     0     0     0     2     3     4     0     0     0     5     2     1

T_out

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How to add together values in matrix and replace the empty spaces with zeroes

How to add together values in matrix and replace the empty spaces with zeroes