MATLAB: Selecting random points from data file

Question

Hi, is there any algorethim to select random points from a large data file. Lets say I want to select data after every 20 values. x = [1:0.1:1000]

If I want y = select every 10th 20th or 50th point of x

Thanks Amb

Answer 1

x = [1:0.1:1000];
x_every10th=x(10:10:numel(x));
x_every20th=x(20:20:numel(x));
x_every50th=x(50:50:numel(x));

You get the idea.