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use std::f64; use axis; #[derive(Debug)] pub struct Scatter { pub data: Vec<(f64, f64)>, pub x_axis: axis::Axis, pub y_axis: axis::Axis, } impl Scatter { pub fn from_vec(v: &[(f64, f64)]) -> Scatter { let mut x_min = f64::INFINITY; let mut x_max = f64::NEG_INFINITY; let mut y_min = f64::INFINITY; let mut y_max = f64::NEG_INFINITY; let mut data: Vec<(f64, f64)> = vec![]; for &(x, y) in v { x_min = x_min.min(x); x_max = x_max.max(x); y_min = y_min.min(y); y_max = y_max.max(y); data.push((x, y)); } let x_range = x_max - x_min; let y_range = y_max - y_min; x_min = x_min - (x_range / 20.0); x_max = x_max + (x_range / 20.0); y_min = y_min - (y_range / 20.0); y_max = y_max + (y_range / 20.0); let x_axis = axis::Axis::new(x_min, x_max); let y_axis = axis::Axis::new(y_min, y_max); Scatter { data: data, x_axis: x_axis, y_axis: y_axis, } } }