Module: IRuby::Output::HTML::WordCloud

Defined in:
lib/iruby/output/html.rb

Overview

stolen from github.com/Bantik/heatmap/blob/master/lib/heatmap.rb

Class Method Summary collapse

Class Method Details

.element_heat(val, max) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 161

def self.element_heat(val, max)
  sprintf("%02x" % (200 - ((200.0 / max) * val)))
end

.element_size(histogram, key) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 157

def self.element_size(histogram, key)
  (((histogram[key] / histogram.map{|k,v| histogram[k]}.reduce(&:+).to_f) * 100) + 5).to_i
end

.histogram_max(histogram) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 153

def self.histogram_max(histogram)
  histogram.map{|k,v| histogram[k]}.max
end

.wordcloud(histogram = {}) ⇒ Object 



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# File 'lib/iruby/output/html.rb', line 139

def self.wordcloud(histogram={})
  html = %{<div class="wordcloud">}
  histogram.keys.sort{|a,b| histogram[a] <=> histogram[b]}.reverse.each do |k|
    next if histogram[k] < 1
    _max = histogram_max(histogram) * 2
    _size = element_size(histogram, k)
    _heat = element_heat(histogram[k], _max)
    html << %{
<span class="wordcloud_element" style="color: ##{_heat}#{_heat}#{_heat}; font-size: #{_size}px;">#{k}</span>
      }
  end
  html << %{<br style="clear: both;" /></div>}
end