There are two issues with your code:
- You're performing the min on just one element, since d is scalar. You either meant to just compare the element value to 300 (without min):
for d = ...
if cutForce{c}(d) < 300
...
or you meant to use min, in which case you did not need a loop:
d = round(...) : round(...) %d is just a list of indices
if min(cutForce{c})d) < 300
...
- More importantly, you are removing element of a sequence while you're iterating over an index of the sequence which does not know that elements have been remove. For example, imagine that when c = 2 your condition is true. You delete the second element, so third element becomes 2nd, 4th becomes third, etc. On the next pass of the loop, c becomes 3, which was the 4th element before. So you never test the original 3rd. Furthermore, when you reach the end, there's less elements than expected, so you're going to get an indexing error. The solution to this is to gather the list of indices to remove in the loop and perform the deletion afterward:
todelete = false(size(cutForce)); %vector that keeps track of which elements to delete
for c = 1:numel(cutForce) %I prefer numel to length as it works with n-d arrays.
testvector = cutForce{c}(round(numel(cutTime{c})/4) : round(3*numel(cutTime{c})/4));
%the above can also be written using the end keyword:
%testvector = cutForce{c}(round(end/4) : round(3*end/4));
todelete(c) = min(testvector) < 300; %either true or false
end
cutForce(todelete) = []; %delete all elements at once after the loop
todelete = cellfun(@(v) min(v(round(end/4):round(3*end/4))) < 300, cutForce);
cutForce(todelete) = [];
