Take percentage of a data set

I need to take 17.65% of a 2016x1 double array (meaning I only want 17.65% of the data in that array).

What would the code for this look like?

Thanks!

[Azzi Abdelmalek]

If a=4; what is 17.65% of a?

Answer 1

[Walter Roberson]

   num_to_fetch = round(17.65 / 100 * length(YourVector));
   your_subset = YourVector(randperm(length(YourVector), num_to_fetch));

[jgillis16]

Thanks!