fn mul_scalar(&self, rhs: Self::Scalar) -> Self {
        assert_eq!(self.dtype, rhs.dtype, "DTypes are not same (mul_scalar)");

        dtype_match!(
            N;
            self.dtype,
            self.to_vec(),
            |x| mul_scalar(x, rhs.unwrap());
            Vec
        )
    }
Mul Scalar

# Example

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

fn main() {
let a = Series::new(vec![1,2,3]);
let b = Scalar::new(2);
let c = a.mul_scalar(b);
assert_eq!(c, Series::new(vec![2,4,6]));
}
```
src/structure/dataframe.rs