As others correctly noted, it is not a good practice to use a not pre-allocated array as it highly reduces your running speed.
Solution 1: In fact it is possible to have dynamic structures in Matlab environment too. However, it is not a native Matlab structure. Recently, I had to write a graph traversal script in Matlab that required a dynamic stack. To do so, you can simply use a Stack from java libraries for example. It is quite powerful and you can handle almost all different types of data! You can simply borrow this from java within matlab by;
import java.util.*;
A = Stack();
A.push(i);
A.pop();
Solution 2: When I deal with arrays that I do not have any idea how big they have to be, I normally initialize them with an overestimated large size, then assign a counter to them and remove the nonused part in the end of the script. For example:
A = zeros(1,1000000);
counter = 1;
rn = 0;
while rn ~= 8
A(counter) = rn;
rn = randi(10,1,1);
counter = counter + 1;
end
A = A(1:counter-1);
Hope that was what you were looking for! Cheers
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