Filtering a large vector by two separate vectors with ranges

I have a large dataset with about 140,000 rows, I am trying to filter out the rows into certain ranges, which I have stored in two separate column vectors: 1 column for the start indeces, and one for the end indeces. I want to form a vector of this form: [start(1):end(1) start(2):end(2) .... ]. Since each range is not equal in value, I am having trouble using a loop to join the vectors together. Any help is appreciated, Thank you.

Example:

Start = [1; 10; 20];

End = [5; 17; 25];

Desired Result: [1 2 3 4 5 10 11 12 ... 17 20 21 ... 25]

Answer 1

[Dyuman Joshi]

Start = [1; 10; 20];
End = [5; 17; 25];


n = numel(Start);
C = cell(1,n);

for k=1:n
    C{1,k} = Start(k):End(k);
end

C = [C{:}]

C = 1×19

1 2 3 4 5 10 11 12 13 14 15 16 17 20 21 22 23 24 25