Plotting in Rust

help
1

Is there any recommended way to plot in rust?

I am using plotters, but it does not seem to integrate easily with ndarray.

More concretely something like

use plotters::prelude::*;
use ndarray::{Array, Array1, Zip};
use ndarray_rand::RandomExt;
use ndarray_rand::rand_distr::{Uniform, StandardNormal};


fn main() {
let drawing_area = BitMapBackend::new("outs/output.png", (600, 400))
    .into_drawing_area();

drawing_area.fill(&WHITE).unwrap();

let mut chart = ChartBuilder::on(&drawing_area)
.caption("Figure Sample", ("Arial", 30))
.set_label_area_size(LabelAreaPosition::Left, 40)
.set_label_area_size(LabelAreaPosition::Bottom, 40)
.build_cartesian_2d(-10.0..(100.0*1.1), -10.0..100.0)
.unwrap();

let ip = Array::random(n_samples, Uniform::new(0., 10.));
chart.draw_series(
    ip.map(|point| TriangleMarker::new((point, 2.*(*point)), 5, &BLUE.mix(0.3))),
)
.unwrap();
}

fails with the following error

error[E0277]: the trait bound `for<'b> &'b plotters::element::TriangleMarker<(&f64, f64), {integer}>: PointCollection<'b, (f64, f64)>` is not satisfied
  --> charts/src/main.rs:69:7
   |
69 | chart.draw_series(
   |       ^^^^^^^^^^^ the trait `for<'b> PointCollection<'b, (f64, f64)>` is not implemented for `&'b plotters::element::TriangleMarker<(&f64, f64), {integer}>`
   |
   = help: the following implementations were found:
             <&'a plotters::element::TriangleMarker<Coord, Size> as PointCollection<'a, Coord>>

For more information about this error, try `rustc --explain E0277`.
2

Read the error message:

^^^^^^^^^^^ the trait `for<'b> PointCollection<'b, (f64, f64)>` is not implemented for `&'b plotters::element::TriangleMarker<(&f64, f64), {integer}>`

You are not giving the right type - Nothing related to either ndarray or plotters.

You need to make types in your code consistent.

2 Likes
3

Yikes. My bad.

4

Plotting revenge?

5

Slightly off-topic, would Polars integration with Plotters any easier or more difficult? Could not find working example.

6

There was an old thread where someone wanted to integrate the two (dont think it's been done yet).

1 Like
7

Thanks. Indeed, that's all I can find from Internet search.

8

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