Charty - Visualizing your data in Ruby

Charty is open-source Ruby library for visualizing your data in a simple way. In Charty, you need to write very few lines of code for representing what you want to do. It lets you focus on your analysis of data, instead of plotting.

Installation

MacOS:

$ brew install Python
$ pip3 install matplotlib
$ bundle

Ubuntu + pyenv

You should install tk libraries before install python and should add enabling shared library option to installing python. So you may have to do pyenv uninstall 3.x.x first.

$ apt install -y tk-dev python3-tk
$ CONFIGURE_OPTS="--enable-shared" pyenv install 3.x.x

With Matplotlib

sudo gem install charty --pre
sudo gem install matplotlib
sudo apt install python3-pip
sudo python3 -m pip install -U pip matplotlib

Development with Docker

e.g.

$ docker build -f ./Dockerfile.dev -t charty-dev:latest .
$ docker run --rm -v $(pwd):/charty charty-dev:latest bundle install
$ docker run --rm -it -v $(pwd):/charty charty-dev:latest ./bin/console
irb(main):001:0> Charty::VERSION
=> "0.2.2"

# When using jupyter notebook
$ docker run --rm -it -v $(pwd):/charty -p 8888:8888 charty-dev:latest

Usage

require 'charty'
charty = Charty::Plotter.new(:pyplot)

bar = charty.bar do
  series [0,1,2,3,4], [10,40,20,90,70], label: "sample1"
  series [0,1,2,3,4], [90,80,70,60,50], label: "sample2"
  series [0,1,2,3,4,5,6,7,8], [50,60,20,30,10, 90, 0, 100, 50], label: "sample3"
  range x: 0..10, y: 1..100
  xlabel 'foo'
  ylabel 'bar'
  title 'bar plot'
end
bar.render("sample_images/bar_pyplot.png")

Charty also supports Daru::DataFrame, Numo::NArray, NMatrix and ActiveRecord as Data Abstraction Layer. For example.

require 'charty'
charty = Charty::Plotter.new(:pyplot)


### when Daru::DataFrame
require 'daru'
df = Daru::DataFrame.new({'a':[1,2,3,4], 'b':[4,5,6,7], 'c':[8, 9, 10, 11]})
charty.table = df


### when Numo::NArray
require "numo/narray"
narray = Numo::DFloat.new(3,5).seq
charty.table = narray


### when NMatrix
require "nmatrix"
nmatrix = NMatrix.new([3, 4], [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11], dtype: :int64)
charty.table = nmatrix


### when ActiveRecord
require "active_record"
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Schema.define do
  create_table :foos do |t|
    t.integer :price
    t.integer :sales
  end
end
class Foo < ActiveRecord::Base
end
100.times{|i| Foo.create!(price: 10 * i, sales: (1..100).to_a.sample) }
sales = Foo.where("sales >= 40")
charty.table = sales


bar = charty.to_bar(:price, :sales)
bar.render('sample')

box_plot = charty.to_box_plot(:price, :sales)
box_plot.render('sample')

bubble = charty.to_bubble(:price, :sales, :id)
bubble.render('sample')

curve = charty.to_curve(:price, :sales)
curve.render('sample')

scatter = charty.to_scatter(:price, :sales)
scatter.render('sample')

error_bar = charty.to_error_bar(:price, :sales)
error_bar.render('sample')

hst= charty.to_hst(:price, :sales)
hst.render('sample')

Examples

create an instance of the library you want to use.

require 'charty'

# when you want to use matplotlib.pyplot
charty = Charty::Plotter.new(:pyplot)

# when you want to use gruff
charty = Charty::Plotter.new(:gruff)

# when you wanto to use rubyplot
charty = Charty::Plotter.new(:rubyplot)

Bar

bar = charty.bar do
  series [0,1,2,3,4], [10,40,20,90,70], label: "sample1"
  series [0,1,2,3,4], [90,80,70,60,50], label: "sample2"
  series [0,1,2,3,4,5,6,7,8], [50,60,20,30,10, 90, 0, 100, 50], label: "sample3"
  range x: 0..10, y: 1..100
  xlabel 'foo'
  ylabel 'bar'
  title 'bar plot'
end
bar.render("sample_images/bar_pyplot.png")

PyPlot

bar pyplot

Gruff

bar gruff

Rubyplot

bar rubyplot

Curve

curve2 = charty.curve do
  series [0,1,2,3,4], [10,40,20,90,70], label: "sample1"
  series [0,1,2,3,4], [90,80,70,60,50], label: "sample2"
  series [0,1,2,3,4,5,6,7,8], [50,60,20,30,10, 90, 0, 100, 50], label: "sample3"
  range x: 0..10, y: 1..100
  xlabel 'foo'
  ylabel 'bar'
end
curve2.render("sample_images/curve_pyplot.png")

PyPlot

curve2 pyplot

Gruff

curve2 gruff

Rubyplot

curve2 rubyplot

Curve with function

curve = charty.curve do
  function {|x| Math.sin(x) }
  range x: 0..10, y: -1..1
  xlabel 'foo'
  ylabel 'bar'
end
curve.render("sample_images/curve_with_function_pyplot.png")

PyPlot

curve pyplot

Gruff

Not supported

Rubyplot

curve rubyplot

Box plot

box_plot = charty.box_plot do
  data [[60,70,80,70,50], [100,40,20,80,70], [30, 10]]
  range x: 0..10, y: 1..100
  xlabel 'foo'
  ylabel 'bar'
  title 'box plot'
end
box_plot.render("sample_images/box_plot_pyplot.png")

PyPlot

box pyplot

Gruff

Not supported

Rubyplot

Not supported

Scatter

scatter = charty.scatter do
  series 0..10, (0..1).step(0.1), label: 'sample1'
  series 0..5, (0..1).step(0.2), label: 'sample2'
  series [0, 1, 2, 3, 4], [0, -0.1, -0.5, -0.5, 0.1], label: 'sample3'
  range x: 0..10, y: -1..1
  # xlabel 'x label'
  # xlabel ''
  ylabel 'y label'
  title 'scatter sample'
end
scatter.render("sample_images/scatter_pyplot.png")

PyPlot

scatter pyplot

Gruff

scatter gruff

Rubyplot

scatter rubyplot

Errorbar

error_bar = charty.error_bar do
  series [1,2,3,4], [1,4,9,16], xerr: [0.5,1.0,1.5,0.3], yerr: [0.6,0.2,0.8,0.1], label: 'label1'
  series [1,2,3,4], [16,9,4,1], label: 'label2'
  series [1,2,3,4,5,6,7,8], [14,14,14,14,14,14,14,14], label: 'label2', xerr: [0.5,1.0,1.5,0.3, 1.1, 1.2, 1.3, 1.4]
  range x: 0..10, y: -1..20
  xlabel 'x label'
  title 'error_bar'
end
error_bar.render("sample_images/error_bar_pyplot.png")

PyPlot

error_bar pyplot

Gruff

Not supported

Rubyplot

Not supported

Bubble chart

bubble = charty.bubble do
  series 0..10, (0..1).step(0.1), [10, 100, 1000, 20, 200, 2000, 5, 50, 500, 4, 40], label: 'sample1'
  series 0..5, (0..1).step(0.2), [1, 10, 100, 1000, 500, 100], label: 'sample2'
  series [0, 1, 2, 3, 4], [0, -0.1, -0.5, -0.5, 0.1], [40, 30, 200, 10, 5]
  range x: 0..10, y: -1..1
  xlabel 'x label'
  ylabel 'y label'
  title 'bubble sample'
end
bubble.render("sample_images/bubble_pyplot.png")

PyPlot

bubble pyplot

Gruff

Not supported

Rubyplot

bubble rubyplot

Histogram

hist = charty.hist do
  data [[10, 10, 20, 30, 40, 40,40,40,40,40, 50, 10, 10, 10], [100, 100, 100, 100, 90, 90, 80, 30, 30, 30, 30, 30]]
  range x: 0..100, y: 0..7
  xlabel 'x label'
  ylabel 'y label'
  title 'histogram sample'
end
hist.render("sample_images/hist_pyplot.png")

PyPlot

hist pyplot

Gruff

Not supported

Rubyplot

Not supported

Subplots

layout = charty.layout
layout << curve
layout << scatter
layout.render("sample_images/subplot_pyplot.png")

PyPlot

subplot pyplot

Gruff

Not supported

Rubyplot

Not supported

Subplots 2

curve_list = [0.5, 0.75].map do |f|
  charty.curve(f:f) do
    function {|x| Math.sin(f*x) }
    range x: 0..10, y: -1..1
  end
end

scatter_list = [-0.5, 0.5].map do |f|
   charty.scatter(f: f) do
    series Charty::Linspace.new(0..10, 20), Charty::Linspace.new(0..f, 20)
    range x: 0..10, y: -1..1
  end
end

grid_layout = charty.layout(:grid2x2)
grid_layout << curve_list
grid_layout << scatter_list
grid_layout.render("sample_images/subplot2_pyplot.png")

PyPlot

subplot2 pyplot

Gruff

Not supported

Rubyplot

Not supported

Acknowledgements

The concepts of this library is borrowed from Python's HoloViews and Julia's Plots ecosystem.

Authors

Kenta Murata <[email protected]>
Kazuma Furuhashi <[email protected]>

License

MIT License