Once you upload the data from you .csv you can find start and end indeces by doing:
data = randi(2,1e3,1) - 1;
startIdx = strfind([0 data'],[0 1]);
endIdx = strfind([data' 0],[1 0]);
You can access the jth block of 1s by doing:
j = 100;
data(startIdx(100):endIdx(100))'
And for zeros:
j = 100;
data(endIdx(j-1)+1:startIdx(j)-1)'
Alternatively you can find indeces corresponding to zeros as:
startIdx = strfind([1 data'],[1 0]);
endIdx = strfind([data' 1],[0 1]);
j = 100;
data(startIdx(j):endIdx(j))'
