Condensing code cannnot figure out easier function to use

I know that the actual data is not included on this but i am trying to find a way to read groups of 300 data points at a time, sum up the amount of ones in each group, and compare it to a condtion to count as either a 1 or 0. I included down below the way that i am originally doing it but it is not very efficent. Anyone know what function i can use to shorten it?

max = 30



Z1 = difference(1:300); % assigning variables to individual increments of the original vector. 
Z2 = difference(301:600);
Z3 = difference(601:900);
Z4 = difference(901:1200);
Z5 = difference(1201:1500);
Z6 = difference(1501:1800);
Z7 = difference(1801:2100);
Z8 = difference(2101:2400);
Z9 = difference(2401:2700);
Z10 = difference(2710:3000);
Z11 = difference(3001:3300);
Z12 = difference(3301:3600);
Z13 = difference(3601:3900);
Z14 = difference(3901:4200);
Z15 = difference(4201:4500);
Z16 = difference(4501:4800);
Z17 = difference(4801:5100);
Z18 = difference(5101:5400);
Z19 = difference(5401:5700);
Z20 = difference(5701:6000);
Z21 = difference(6001:6300);
Z22 = difference(6301:6600);
Z23 = difference(6601:6900);
Z24 = difference(6901:7200);
Z25 = difference(7201:7500);
Z26 = difference(7501:7800);
Z27 = difference(7801:8100);
Z28 = difference(8101:8400);
Z29 = difference(8401:8700);
Z30 = difference(8701:9000);
Z31 = difference(9001:9268);
W1 =sum(Z1); % summing amount of ones in each vector
W2 =sum(Z2);
W3 =sum(Z3);
W4 =sum(Z4);
W5 =sum(Z5);
W6 =sum(Z6);
W7 =sum(Z7);
W8 =sum(Z8);
W9 =sum(Z9);
W10 =sum(Z10);
W11 =sum(Z11);
W12 =sum(Z12);
W13 =sum(Z13);
W14 =sum(Z14);
W15 =sum(Z15);
W16 =sum(Z16);
W17 =sum(Z17);
W18 =sum(Z18);
W19 =sum(Z19);
W20 =sum(Z20);
W21 =sum(Z21);
W22 =sum(Z22);
W23 =sum(Z23);
W24 =sum(Z24);
W25 =sum(Z25);
W26 =sum(Z26);
W27 =sum(Z27);
W28 =sum(Z28);
W29 =sum(Z29);
W30 =sum(Z30);
W31 =sum(Z31);

if  W1 >= max  % comparing amount of ones in each group to the max value or 30. If the number of ones exceed 30, then assign a 1 to the group, if not then assign a 0.
      count = count + 1 % keeps track of how many times the number of ones in each group exceeds the max value of 30.
end
    if  W2 >= max
      count = count + 1
    end
    if  W3 >= max
      count = count + 1
    end
    if  W4 >= max
      count = count + 1
    end
    if  W5 >= max
      count = count + 1
    end
    if  W6 >= max
      count = count + 1
    end
    if  W7 >= max
      count = count + 1
    end
    if  W8 >= max
      count = count + 1
    end
    if  W9 >= max
      count = count + 1
    end
    if  W10 >= max
      count = count + 1
    end
    if  W11 >= max
      count = count + 1
    end
    if  W12 >= max
      count = count + 1
    end
    if  W13 >= max
      count = count + 1
    end
    if  W14 >= max
      count = count + 1
    end
    if  W15 >= max
      count = count + 1
    end
    if  W16 >= max
      count = count + 1
    end
    if  W17 >= max
      count = count + 1
    end
    if  W18 >= max
      count = count + 1
    end
    if  W19 >= max
      count = count + 1
    end
    if  W20 >= max
      count = count + 1
    end
if  W21 >= max
      count = count + 1
end
    if  W22 >= max
      count = count + 1
    end
    if  W23 >= max
      count = count + 1
    end
    if  W24 >= max
      count = count + 1
    end
    if  W25 >= max
      count = count + 1
    end
    if  W26 >= max
      count = count + 1
    end
    if  W27 >= max
      count = count + 1
    end
    if  W28 >= max
      count = count + 1
    end
    if  W29 >= max
      count = count + 1
    end
if  W30 >= max
      count = count + 1
end
if  W31 >= max
      count = count + 1
    end

 
 
 
 
    

[Catalytic]

All 4 of your posted questions appear to be the same question phrased in somewhat different ways. You should not abandon a post just to clarify it in a different post. You should clarify yourself in your existing post.

Also, you have not accepted any of the previous answers, even though they seem valid for the question as you formulated it. You should not abandon a post without accepting an answer if/when a valid answer has been given.

Answer 1

[Catalytic]

threshold=30; %don't call this "max"
blocklen=300;

difference=rand(1,9268);

N=numel(difference);
Nc=ceil(N/blocklen)*blocklen;

difference(N+1:Nc)=nan;

W=sum( reshape(difference,blocklen,[]),1,'omitnan');


count=sum(W>=threshold)

count = 30

Answer 2

[Torsten]

number_of_elements = 9268;
blocklength = 300; 
maximum = 30;

rest = mod(number_of_elements,blocklength)
number_of_elements_minus_rest = number_of_elements - rest;
number_of_blocks = number_of_elements_minus_rest/blocklength;

difference = 0.2*rand(1,number_of_elements);
difference = [reshape(difference(1:number_of_elements_minus_rest),number_of_blocks,blocklength); ...
                     [difference(number_of_elements_minus_rest+1:number_of_elements),zeros(1,blocklength-rest)]];
sum_of_blocks = sum(difference,2);
count = sum(sum_of_blocks >= maximum)

Answer 3

[Matt J]

thresh=30;

G=repelem(1:31,300)'; 

count = sum( accumarray(G(1:numel(differences)),differences(:)) > thresh);