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//! Some plotting functionality using gnuplot
extern crate gnuplot;
use gnuplot::*;
use std::hash::Hash;

/// A simple plot
pub fn plot_simple<T: Clone + Eq + Hash + DataType>(
  map: &[(T, usize)],
  x_label: &str,
  y_label: &str,
  title: &str,
  pathname: &str,
) {
  let keys: Vec<T> = map.iter().map(|entry| entry.0.clone()).collect();
  let log_values = map.iter().map(|entry| (entry.1 as f64).log2());
  let mut fg = Figure::new();
  fg.axes2d()
    .points(
      keys,
      log_values,
      &[PointSymbol('O'), Color("#ffaa77"), PointSize(1.2)],
    )
    .set_x_label(x_label, &[Rotate(45.0)])
    .set_y_label(y_label, &[Rotate(90.0)])
    .set_title(title, &[]);

  fg.set_terminal("pngcairo", pathname);
  fg.show().unwrap();
}