plotpy/tests/test_plot.rs at main · cpmech/plotpy

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use plotpy::{linspace, Curve, Image, Plot, StrError, SuperTitleParams, Text};

use std::f64::consts::PI;

use std::fs::File;

use std::io::{BufRead, BufReader};

use std::path::Path;

const OUT_DIR: &str = "/tmp/plotpy/integ_tests";

#[test]

fn test_plot() -> Result<(), StrError> {

// curve object and options

let mut curve = Curve::new();

// draw curve

let x = &[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0];

let y = &[1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 3.5, 3.5, 3.5, 3.5];

curve.draw(x, y);

// configure plot

let mut plot = Plot::new();

plot.set_subplot(2, 2, 1)

.set_horizontal_gap(0.1)

.set_vertical_gap(0.2)

.set_gaps(0.3, 0.4)

.set_equal_axes(true)

.set_hide_axes(false)

.set_range(-1.0, 1.0, -1.0, 1.0)

.set_range_from_vec(&[0.0, 1.0, 0.0, 1.0])

.set_xmin(0.0)

.set_xmax(1.0)

.set_ymin(0.0)

.set_ymax(1.0)

.set_xrange(0.0, 1.0)

.set_yrange(0.0, 1.0)

.set_num_ticks_x(0)

.set_num_ticks_x(8)

.set_num_ticks_y(0)

.set_num_ticks_y(5)

.set_save_transparent(true)

.set_label_x("x-label")

.set_label_y("y-label")

.set_labels("x", "y")

.clear_current_axes();

plot.clear_current_figure();

plot.set_title("my plot'") // the extra "'" should be sanitized

.set_frame_borders(false)

.set_frame_borders(true)

.set_frame_borders(false)

.set_ticks_x(1.5, 0.5, "%.2f")

.set_ticks_y(0.5, 0.1, "%g");

plot.grid_and_labels("x", "y");

// add curve to plot

plot.add(&curve);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot.svg");

plot.set_figure_size_points(250.0, 250.0 * 0.75);

plot.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

assert!(lines_iter.count() > 900);

Ok(())

}

fn gen_curve_3d() -> Curve {

// curve

let mut curve = Curve::new();

// https://matplotlib.org/stable/gallery/mplot3d/lines3d.html

// theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)

// z = np.linspace(-2, 2, 100)

// r = z**2 + 1

// x = r * np.sin(theta)

// y = r * np.cos(theta)

let np = 101;

let t0 = -4.0 * PI;

let t1 = 4.0 * PI;

let dt = (t1 - t0) / ((np - 1) as f64);

let z0 = -2.0;

let z1 = 2.0;

let dz = (z1 - z0) / ((np - 1) as f64);

let mut xx = vec![0.0; np];

let mut yy = vec![0.0; np];

let mut zz = vec![0.0; np];

for i in 0..np {

let theta = t0 + (i as f64) * dt;

let z = z0 + (i as f64) * dz;

let r = z * z + 1.0;

xx[i] = r * f64::sin(theta);

yy[i] = r * f64::cos(theta);

zz[i] = z;

}

curve.draw_3d(&xx, &yy, &zz);

curve

}

#[test]

fn test_plot_3d() -> Result<(), StrError> {

// curve

let curve = gen_curve_3d();

// plot

let mut plot = Plot::new();

plot.set_subplot_3d(2, 2, 1)

.add(&curve)

.set_labels_3d("X AXIS", "Y AXIS", "Z AXIS")

.set_num_ticks_x(0)

.set_num_ticks_y(0)

.set_num_ticks_z(0)

.set_subplot_3d(2, 2, 2)

.add(&curve)

.set_label_x("X AXIS IS BEAUTIFUL")

.set_label_y("Y AXIS IS BEAUTIFUL")

.set_label_z("Z AXIS IS BEAUTIFUL")

.set_xrange(-3.0, 3.0)

.set_yrange(-3.0, 3.0)

.set_zrange(-1.5, 1.5)

.set_num_ticks_x(3)

.set_num_ticks_y(3)

.set_num_ticks_z(3)

.set_hide_xticks()

.set_hide_yticks()

.set_hide_zticks()

.set_subplot_3d(2, 2, 3)

.add(&curve)

.set_labels_3d("X HERE", "Y HERE", "Z HERE")

.set_xmin(-2.0)

.set_xmax(2.0)

.set_ymin(-2.0)

.set_ymax(2.0)

.set_zmin(-1.0)

.set_zmax(1.0)

.set_subplot_3d(2, 2, 4)

.add(&curve)

.set_hide_xticks()

.set_hide_yticks()

.set_hide_zticks()

.set_label_x_and_pad("X IS CLOSER NOW", -15.0)

.set_label_y_and_pad("Y IS CLOSER NOW", -15.0)

.set_label_z_and_pad("Z IS CLOSER NOW", -15.0)

.set_range_3d(-10.0, 10.0, -10.0, 10.0, -3.0, 3.0);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_3d.svg");

plot.set_horizontal_gap(0.2)

.set_save_pad_inches(0.4)

.set_figure_size_points(600.0, 600.0)

.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let n_lines = lines_iter.count();

assert!(n_lines > 1800 && n_lines < 1900);

Ok(())

}

#[test]

fn test_plot_error() {

let plot = Plot::new();

let path = Path::new(OUT_DIR).join("integ_plot_error.xyz");

assert_eq!(plot.save(&path).err(), Some("python3 failed; please see the log file"));

}

#[test]

fn test_plot_handles_quotes() -> Result<(), StrError> {

let mut plot = Plot::new();

plot.set_title("\"$\\int$ \"The Plot of the Developer\" $versus$ \"Developer's Plot\" $\\mathrm{d}\\sigma$\"");

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_handles_quotes.svg");

plot.set_figure_size_points(250.0, 250.0 * 0.75);

plot.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let count = lines_iter.count();

assert!(count > 920 && count < 980);

Ok(())

}

#[test]

fn test_plot_title_handles_tex() -> Result<(), StrError> {

let mut plot = Plot::new();

plot.set_title("Van der Pol ($\\varepsilon = 10^{-6}$) - Radau5 - Tol = 1e-4");

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_title_handles_tex.svg");

plot.set_figure_size_points(250.0, 250.0 * 0.75);

plot.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let count = lines_iter.count();

assert!(count > 800 && count < 850);

Ok(())

}

#[test]

fn test_plot_subplots() -> Result<(), StrError> {

// curve object and options

let mut curve = Curve::new();

// draw curve

let x = &[1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0];

let y = &[1.0, 4.0, 9.0, 16.0, 25.0, 36.0, 49.0, 64.0];

curve.draw(x, y);

// params for super title

let mut params = SuperTitleParams::new();

params.set_align_vertical("bottom");

// configure plot

let mut plot = Plot::new();

plot.set_super_title("\"$\\int$ Plot's Owner Says $\\mathrm{d}\\sigma$\": This is the \"super title\", \\n followed by a very long text to see \\n if this whole thing will be wrapped or not \\n we hope that it gets wrapped and beautifully formatted.\"", Some(&params))

.set_horizontal_gap(0.5)

.set_vertical_gap(0.5)

.set_gaps(0.3, 0.3);

// add curve to subplots

plot.set_subplot(2, 2, 1).set_title("\"Owner's First\"").add(&curve);

plot.set_subplot(2, 2, 2).set_title("\"Owner's Second\"").add(&curve);

plot.set_subplot(2, 2, 3).set_title("\"Owner's Third\"").add(&curve);

plot.set_subplot(2, 2, 4).set_title("\"Owner's Fourth\"").add(&curve);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_subplots.svg");

plot.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

assert!(lines_iter.count() > 1450);

Ok(())

}

#[test]

fn test_plot_log() -> Result<(), StrError> {

// curves

let mut curve1 = Curve::new();

let mut curve2 = Curve::new();

let mut curve3 = Curve::new();

let mut curve4 = Curve::new();

// draw curve

let x = linspace(1.0, 11.0, 11);

let y: Vec<_> = x.iter().map(|v| f64::exp(*v)).collect();

curve1.draw(&x, &x);

curve2.draw(&x, &y);

curve3.draw(&y, &x);

curve4.draw(&y, &y);

// configure plot

let mut plot = Plot::new();

// add curve to subplots

plot.set_subplot(2, 2, 1);

plot.set_log_x(false);

plot.set_log_y(false);

plot.add(&curve1);

plot.set_subplot(2, 2, 2);

plot.set_log_x(false);

plot.set_log_y(true);

plot.add(&curve2);

plot.set_subplot(2, 2, 3);

plot.set_log_x(true);

plot.set_log_y(false);

plot.add(&curve3);

plot.set_subplot(2, 2, 4);

plot.set_log_x(true);

plot.set_log_y(true);

plot.add(&curve4);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_log.svg");

plot.save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

assert!(lines_iter.count() > 980);

Ok(())

}

#[test]

fn test_plot_multiple_of_pi() -> Result<(), StrError> {

// configure curve

let mut cos_curve = Curve::new();

let mut sin_curve = Curve::new();

cos_curve.set_line_width(2.0);

sin_curve.set_line_width(2.0).set_line_color("#cd0000");

// add points

const N: usize = 30;

cos_curve.points_begin();

sin_curve.points_begin();

for i in 0..N {

let u = (i as f64) * 2.0 * PI / ((N - 1) as f64);

cos_curve.points_add(u, f64::cos(u));

sin_curve.points_add(f64::sin(u), u);

}

cos_curve.points_end();

sin_curve.points_end();

// configure plot

let mut plot = Plot::new();

plot.set_gaps(0.3, 0.0).set_figure_size_points(600.0, 250.0);

// add cos curve to plot

plot.set_subplot(1, 2, 1);

plot.add(&cos_curve).grid_and_labels("x", "y=cos(x)");

plot.set_ticks_x_multiple_of_pi(0.0);

// add sin curve to plot

plot.set_subplot(1, 2, 2);

plot.add(&sin_curve).grid_and_labels("x=sin(y)", "y");

plot.set_ticks_y_multiple_of_pi(0.0);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_multiple_of_pi.svg");

plot.set_show_errors(true).save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

assert!(lines_iter.count() > 1060);

Ok(())

}

#[test]

fn test_plot_extra_functionality() -> Result<(), StrError> {

// plot

let mut plot = Plot::new();

plot.set_horiz_line(-0.5, "green", "-", 1.0)

.set_vert_line(-0.75, "gold", ":", 10.0)

.set_cross(0.25, 0.75, "red", "--", 3.0)

.set_range(-1.0, 1.0, -1.0, 1.0);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_extra_functionality.svg");

plot.set_show_errors(true).save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let n = lines_iter.count();

assert!(n > 490 && n < 530);

Ok(())

}

#[test]

fn test_plot_tick_labels() -> Result<(), StrError> {

// data

let vegetables = [

"cucumber",

"tomato",

"lettuce",

"asparagus",

"potato",

"wheat",

"barley",

];

let farmers = [

"Farmer Joe",

"Upland Bros.",

"Smith Gardening",

"Agrifun",

"Organiculture",

"BioGoods Ltd.",

"Cornylee Corp.",

];

let harvest = [

[0.8, 2.4, 2.5, 3.9, 0.0, 4.0, 0.0],

[2.4, 0.0, 4.0, 1.0, 2.7, 0.0, 0.0],

[1.1, 2.4, 0.8, 4.3, 1.9, 4.4, 0.0],

[0.6, 0.0, 0.3, 0.0, 3.1, 0.0, 0.0],

[0.7, 1.7, 0.6, 2.6, 2.2, 6.2, 0.0],

[1.3, 1.2, 0.0, 0.0, 0.0, 3.2, 5.1],

[0.1, 2.0, 0.0, 1.4, 0.0, 1.9, 6.3],

];

// draw image

let mut img = Image::new();

img.draw(&harvest);

// set tick labels

let mut plot = Plot::new();

let ticks: Vec<_> = (0..vegetables.len()).into_iter().collect();

plot.add(&img)

.set_rotation_ticks_x(45.0)

.set_ticks_x_labels(&ticks, &farmers)

.set_ticks_y_labels(&ticks, &vegetables);

// add text

let mut text = Text::new();

text.set_color("white").set_align_horizontal("center");

for i in 0..vegetables.len() {

for j in 0..farmers.len() {

text.draw(j as f64, i as f64, harvest[i][j].to_string().as_str());

}

plot.add(&text);

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_tick_labels.svg");

plot.set_show_errors(true).save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let n = lines_iter.count();

assert!(n > 1620 && n < 1700);

Ok(())

}

#[test]

fn test_plot_fontsize_and_color_2d() -> Result<(), StrError> {

// curve

let x = [1.0, 2.0, 3.0, 4.0];

let y = [1.0, 4.0, 9.0, 16.0];

let mut curve = Curve::new();

curve.draw(&x, &y);

// add to plot

let mut plot = Plot::new();

plot.add(&curve);

// set fontsize

plot.set_label_x("x axis")

.set_label_x_fontsize(20.0) // after

.set_ticks_x_fontsize(15.0) // after

.set_label_y_fontsize(30.0) // before

.set_ticks_y_fontsize(8.0) // before

.set_label_y("y axis")

.set_label_x_color("red")

.set_label_y_color("blue");

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_fontsize_and_color_2d.svg");

plot.set_show_errors(true).save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let n = lines_iter.count();

assert!(n > 630 && n < 700);

Ok(())

}

#[test]

fn test_plot_fontsize_and_color_3d() -> Result<(), StrError> {

// curve

let curve = gen_curve_3d();

// add to plot

let mut plot = Plot::new();

plot.add(&curve);

// set fontsize

plot.set_save_pad_inches(0.4)

.set_label_x("x axis")

.set_label_x_fontsize(20.0) // after

.set_ticks_x_fontsize(15.0) // after

.set_label_y_fontsize(30.0) // before

.set_ticks_y_fontsize(8.0) // before

.set_label_y("y axis")

.set_label_z_fontsize(15.0)

.set_ticks_z_fontsize(20.0)

.set_label_z("z axis")

.set_label_x_color("red")

.set_label_y_color("blue")

.set_label_z_color("green");

// save figure

let path = Path::new(OUT_DIR).join("integ_plot_fontsize_and_color_3d.svg");

plot.set_show_errors(true).save(&path)?;

// check number of lines

let file = File::open(path).map_err(|_| "cannot open file")?;

let buffered = BufReader::new(file);

let lines_iter = buffered.lines();

let n = lines_iter.count();

assert!(n > 650 && n < 750);

Ok(())

}

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