fn add_vec(&self, rhs: &Self) -> Self {
        assert_eq!(self.dtype, rhs.dtype, "DTypes are not same (add_vec)");
        dtype_match!(
            N;
            self.dtype,
            self.to_vec(),
            |x| add_vec(x, rhs.to_vec());
            Vec
        )
    }
Add series

# Example

```rust
extern crate peroxide;
use peroxide::fuga::*;

fn main() {
let a = Series::new(vec![1,2,3]);
let b = Series::new(vec![3,2,1]);
let c = a.add_vec(&b);
assert_eq!(c, Series::new(vec![4,4,4]));
}
```
src/structure/dataframe.rs