how to change zero in series number

    
0  ====>2
2  ====>2
3  ====>3
5  ====>5
1  ====>1
6  ====>6
0  ====>3
0  ====>3
3  ====>3
4  ====>4
7  ====>7
2  ====>2
0  ====>6
6  ====>6
2  ====>2

0 2 3 5 1 6 0 0 3 4 7 2 0 6 2 
  convert in : 
2 2 3 5 1 6 3 3 3 4 7 2 6 6 2    

rule: I start from the bottom and look for zeros... I assign each zero equal to the NonzeroPrevious value

Answer 1

[Matt J]

y=[0 2 3 5 1 6 0 0 3 4 7 2 0 6 2 ]

y = 1×15

0 2 3 5 1 6 0 0 3 4 7 2 0 6 2

y(y==0)=nan;

out=fillmissing(y,'next')

out = 1×15

2 2 3 5 1 6 3 3 3 4 7 2 6 6 2

[Trop Trader]

yes.it better..thx

Answer 2

[Dyuman Joshi]

Assuming the last element is not zero -

in = [0 2 3 5 1 6 0 0 3 4 7 2 0 6 2].';

idx = in==0;
while any(idx)
    in(idx) = in([false; idx(1:end-1)]);
    idx = in==0;
end
disp(in)

     2
     2
     3
     5
     1
     6
     3
     3
     3
     4
     7
     2
     6
     6
     2