How to solve index exceeds matrix dimensions - MATLAB

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data = getdata(vid,50,'double','cell');
for i=1:5:100
data{i},:,1)=(data{i},:,1))+(data{i+1},:,1))+(data{i+2},:,1))+ ...
(data{i+3},:,1))+(data{i+4},:,1))/5;
data{i},:,3)=(data{i},:,3))+(data{i+1},:,3))+(data{i+2},:,3))+...
(data{i+3},:,3))+(data{i+4},:,3))/5;
data{i},:,2)=(data{i},:,2))+(data{i+1},:,2))+(data{i+2},:,2))+...
(data{i+3},:,2))+(data{i+4},:,2))/5;
end
 

The variable 'data' will now contain a cell array with details of only 50 frames...
But, inside the 'for' loop, you are trying to access till 100, which results in the error
'index exceeds matrix dimensions'...
Inside the 'for' loop i varies as shown:- 1 6 11 16 21 26 31 36 41 46 51 56 61 66 71 76 81 86 91 96

data = getdata(vid,100,'double','cell'); or for i=1:5:50
 

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