//! Stem chart example showing a discrete signal.
use plotkit::prelude::*;
fn main() -> plotkit::Result<()> {
let x: Vec<f64> = (0..20).map(|i| i as f64 * 0.5).collect();
let y: Vec<f64> = x.iter().map(|&v| (v * 0.8).sin() * 3.0).collect();
let mut fig = Figure::with_size(800, 600);
let ax = fig.add_subplot(1, 1, 1);
ax.stem(&x, &y)?
.label("sin(0.8x)")
.marker_size(8.0)
.width(1.5);
ax.set_title("Stem Chart");
ax.set_xlabel("x");
ax.set_ylabel("y");
ax.legend();
fig.save("examples/output/09_stem.png")?;
Ok(())
}