Visualisation introduction with libraries and examples

[practicalli-johnny]

Introduction to Visualization

• what is it
• why is it important
• what aspects should be thought about
• what Clojure libraries are available and what are they most appropriate for
• relation to Vega and Vega Lite
• using other visualizations (python, mathmatica, etc)

Point to references on

• Vega & Vega Lite
• visualization practices
• social impact of visualization

Ascii visualizations

• https://github.com/rosejn/replchart
• https://github.com/joegallo/doric - http://denilab.blogspot.com/2012/12/ascii-printing-of-clojures.html

  
  (require '[doric.core :only [table]])

(defn trunc [x] (double (/ (int (* 100 x)) 100)))

(defn gauss [x] (/ (Math/exp (- ( 1/2 x x))) (Math/sqrt ( 2 Math/PI))))

(println (table ^{:format raw} [:x {:name :y :format bar}] (map (fn [x] {:x (trunc x) :y (int (* 80 (gauss x)))}) (range -2.8 2.8 0.15))))

#### Oz
The swiss army knife of visualization for Clojure/Script

**Projects**
- https://github.com/practicalli/oz-visualisations
- https://github.com/practicalli/covid19-dashboard

#### Viz.clj
Aimed at beginners, low requirements and understanding required.  Leads on to Hanami
https://github.com/scicloj/viz.clj

#### Hanami
https://github.com/jsa-aerial/hanami
Interactive arts and charts visualizations with Clojure(Script), Vega-lite, and Vega. Flower viewing 花見 (hanami)

#### Resources

Vega examples in Observable
https://observablehq.com/@mahog/vega-lite-demo-lets-make-a-scatterplot-matrix

Seaborn - python visualization library
http://seaborn.pydata.org/