Function flot::zip

pub fn zip<'a, I1, I2, T1, T2>(
    x: I1, 
    y: I2
) -> Box<Iterator<Item = (f64, f64)> + 'a> where
    I1: IntoIterator<Item = &'a T1> + 'a,
    I2: IntoIterator<Item = &'a T2> + 'a,
    T1: Into<f64> + Copy + 'a,
    T2: Into<f64> + Copy + 'a, 

join two iterators of references together to produce point tuples. The reference types can be anything that converts to f64