Florence Nightingale used a coxcomb diagram to emphasize the number of deaths due to “preventible or mitigable zymotic diseases”. This graph shows data using a stacked bar chart.
require 'rubyvis' require 'ostruct' load(File.dirname(__FILE__)+"/crimea_data.rb") w = 545 h = 280 #x = pv.Scale.linear($crimea, lambda {|d| d.date}).range(0, w) x=pv.Scale.ordinal($crimea, lambda {|d| d.date}).split_banded(0,w,4/5.0) y = pv.Scale.linear(0, 1500).range(0, h) k=x.range_band / $causes.size fill = pv.colors("lightpink", "darkgray", "lightblue") format = pv.Format.date("%b") vis = pv.Panel.new() .width(w) .height(h) .margin(19.5) .right(40); panel = vis.add(pv.Panel) .data($crimea) .left(lambda {|d| x.scale(d.date)}) .width(x.range_band); panel.add(pv.Bar) .data($causes) .bottom(0) .width(k) .left(lambda { self.index * k}) .height(lambda {|t, d| y.scale(d.send(t))}) .fill_style(lambda {|f| a=fill.scale(self.index); return a}) .stroke_style(lambda {|d| fill_style ? fill_style.darker : pv.color('black')}) .line_width(1); panel.anchor("bottom").add(pv.Label) .visible(lambda { (self.index % 3)==0}) .text_baseline("top") .text_margin(10) .text(lambda {|d| format.format(d.date)}) vis.add(pv.Rule) .data(y.ticks()) .bottom(lambda {|d| y.scale(d)}) .stroke_style(lambda {|i| i!=0 ? pv.color("rgba(255, 255, 255, .5)") : pv.color("black")}) .anchor("right").add(pv.Label) .visible(lambda { (self.index & 1)==0}) .text_margin(6); vis.render(); puts vis.to_svg