Vectorize this loop?

[Matthias Brennwald]

Dear Octavers

Is it possible to get rid of the for loop in the below code by replacing
it by some vectorized code? I somehow think it is, but I can't see how.
Any ideas would be appreciated.

Thanks
Matthias


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point_count = round (rand(1000,1))*5 + 20; % this is just a dummy to
illustrate the problem.
N_vals  = sum (point_count);
N_scans = length (point_count);

scan_idx = repmat (NaN,N_vals,1);
ind = cumsum (point_count); ind = [0 ; ind];
for ii = 1:N_scans
        scan_idx (ind(ii)+1:ind(ii+1)) = ii;
end
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