fn take(&self, n: usize) -> Vec<f64> {
        let mut v = vec![0f64; n];
        v[..n].copy_from_slice(&self[..n]);
        v
    }
Take for `Vec<f64>`

# Examples
```
#[macro_use]
extern crate peroxide;
use peroxide::fuga::*;

fn main() {
let a = c!(1,2,3,4,5);
let b = a.take(3);
assert_eq!(b, c!(1,2,3));
}
```
src/structure/vector.rs