Sparklines for Rust

Inspired by https://github.com/holman/spark and https://gist.github.com/stefanv/1371985

This provides a Rust library sparkline and executable sparkr.

sparkr

$ sparkr --theme classic --min -10 2 4 0 3 9 10 8 2 5 6
▅ ▆ ▅ ▆ █ █ █ ▅ ▇ ▇
$ sparkr --statline --theme colour 2 4 0 3 9 10 8 2 5 6
▂ ▄ ▁ ▃ █ █ ▇ ▂ ▅ ▅
min: 0, max: 10, range: 10
$ sparkr -h
sparkr

Usage:
  sparkr [--min=<min>] [--max=<max>] [--theme=<theme>] [--statline] <values>...
  sparkr [--min=<min>] [--max=<max>] [--theme=<theme>] [--statline]
  sparkr (-h | --help)
  sparkr --version

Options:
  -h --help       Show this screen.
  --version       Show version.
  --min=<min>     Specify minimum value instead of calculating it.
  --max=<max>     Specify maximum value instead of calculating it.
  --statline      Show a line of stats after the sparkline.
  --theme=<theme>   What theme to use, 'colour' or 'classic' (default).
  <values>        Just values.

Note, if the spark line elements are not bottom-aligned, are irregular spaced, or ther overlap one another, try another console font. Using "Menlo Regular" I get nicely aligned, fixed-width, elements.

If you use iTerm2 then you can use --theme png to show the sparkline as an inline image.

library - sparkline

Add this to your Cargo.toml:

[dependencies]
sparkline=0.1

This takes a vec of numbers and prints out a sparkline:

extern crate sparkline;
use sparkline::*;

let (min, max) : (f64, f64) = (0.0, 10.0);
let values = vec![2.0, 3.0, 2.0, 6.0, 9.0];
let sparky = select_sparkline(SparkThemeName::Colour);
for num in values.iter() {
    let s : &String = sparky.spark(min, max, *num);
    print!("{} ", s);
}

Currently the library expects values to be f64.

License

Licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.