Three-dimensional scatter¶
Points of a sunflower spiral lifted to the height of the Julia field and coloured by that height, drawn as filled markers in three dimensions.
Select the image, or download the PDF, to open the vector figure exported by IronLAB.
Source¶
The figure is built by the following code. Its data comes from the functions on the data helpers page.
use ironlab::prelude::*;
use crate::fields::*;
pub const TITLE: &str = "Three-dimensional scatter";
pub const DESCRIPTION: &str = "Points of a sunflower spiral lifted to the height of the Julia field and coloured by \
that height, drawn as filled markers in three dimensions.";
pub fn figure() -> Figure {
let (x, y) = sunflower(300, 1.5);
let z: Vec<f64> = x.iter().zip(&y).map(|(&x, &y)| julia_field(x, y)).collect();
let mut fig = Figure::new()
.size_mm(160.0, 100.0)
.title("Julia field sampled at scattered points");
let mut ax = fig.axes3(0, 0);
ax.scatter3(&x, &y, &z).colors(&z).size(3.0).filled();
ax.xlabel("$x$")
.ylabel("$y$")
.zlabel(r"$\ln(1 + |z_3|)$")
.grid(true);
fig
}