Who Chats the Most?

From my Skype chat history, a visualization of the counts of chats by (anonymised) user.

Code

require 'sqlite3'
require 'rubyvis'

contacts={}
  
# count
db = SQLite3::Database.new("[skype-folder]/main.db")
db.execute("SELECT author, count(author) FROM Messages GROUP BY author ORDER BY count(author) DESC" ) do |author, count|
  #contacts[author]=count # real ones
  contacts[author.split('').sample(3).join]=count if count>60 # Anonymized
end

cs=pv.Colors.category20()
format=Rubyvis::Format.number
color = pv.Colors.category20
nodes = pv.dom(contacts).root("rubyvis").nodes

vis = pv.Panel.new()
    .width(600)
    .height(1000)

treemap = vis.add(Rubyvis::Layout::Treemap).
  nodes(nodes).
  mode("squarify").
  round(true)

treemap.leaf.add(Rubyvis::Panel).
  fill_style(lambda{ |d| cs.scale(d) }).
  stroke_style("#fff").
  line_width(1).
  antialias(true).
  title(lambda {|d| d.node_name + " " + format.format(d.node_value)})

treemap.node_label.add(Rubyvis::Label).
  text_style(lambda {|d| pv.rgb(0, 0, 0, 1)}).
  font(lambda{|d| v=d.node_value/90; (v<=8)? "#8px sans-serif" : "#{v}px sans-serif"})
vis.render

# saves an svg
File.open("contacts.svg", "w+").write vis.to_svg