Small example to understand what is happening:
Lets take a vector and check if all values are >0.
test=1:5>0
In this case test is a logical array containing only ones. A while loop will only work as long ALL conditions in your vector are true. This loop will execute only once:
while test
disp(test)
test(1)=0;
end
Therefor in your code your loop will only work with all values <-1 or all values >1. An easy fix would be to use any.
while any(test)
disp(test)
test(randi(5))=0;
end
