UnicodePlot - Plot your data by Unicode characters

UnicodePlot provides the feature to make charts with Unicode characters.

Documentation

https://red-data-tools.github.io/unicode_plot.rb/

Install

$ gem install unicode_plot

Usage

require 'unicode_plot'

x = 0.step(3*Math::PI, by: 3*Math::PI / 30)
y_sin = x.map {|xi| Math.sin(xi) }
y_cos = x.map {|xi| Math.cos(xi) }
plot = UnicodePlot.lineplot(x, y_sin, name: "sin(x)", width: 40, height: 10)
UnicodePlot.lineplot!(plot, x, y_cos, name: "cos(x)")
plot.render

You can get the results below by running the above script:

Supported charts

barplot

UnicodePlot.barplot(data: {'foo': 20, 'bar': 50}, title: "Bar").render

boxplot

UnicodePlot.boxplot(data: {foo: [1, 3, 5], bar: [3, 5, 7]}, title: "Box").render

densityplot

x = Array.new(500) { 20*rand - 10 } + Array.new(500) { 6*rand - 3 }
y = Array.new(1000) { 30*rand - 10 }
UnicodePlot.densityplot(x, y, title: "Density").render

histogram

x = Array.new(100) { rand(10) } + Array.new(100) { rand(30) + 10 }
UnicodePlot.histogram(x, title: "Histogram").render

lineplot

See Usage section above.

scatterplot

x = Array.new(50) { rand(20) - 10 }
y = x.map {|xx| xx*rand(30) - 10 }
UnicodePlot.scatterplot(x, y, title: "Scatter").render

stemplot

Two-sided stemplot of numbers

eighty_ints = 80.times.map { rand(1..100) }
another_eighty_ints = 80.times.map { rand(1..100) }
# two-sided stem plot
UnicodePlot.stemplot(eighty_ints, another_eighty_ints)

output:

       88544 |  0 | 22345569
   999955431 |  1 | 0445566688
       98110 |  2 | 0568
 85433221100 |  3 | 0234568
      553220 |  4 | 23367
     9777662 |  5 | 22334446679
   988855321 |  6 | 012245555889
     9985510 |  7 | 00044556789
766555444100 |  8 | 0134678
    87776332 |  9 | 13347
           0 | 10 |
Key: 1|0 = 10
The decimal is 1 digit(s) to the right of |

One-sided stem-plot of strings

UnicodePlot.stemplot(eighty_ints)
words_1 = %w[apple junk ant age bee bar baz dog egg a]
UnicodePlot.stemplot(words_1)

output:

a | _gnp
b | aae
c |
d | o
e | g
f |
g |
h |
i |
j | u

Acknowledgement

This library is strongly inspired by UnicodePlot.jl.

License

MIT License

Author

• Kenta Murata