class EverydayCliUtils::Histogram
Public Class Methods
add_averages(height, ks, lines, mi, step, width)
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# File lib/everyday-cli-utils/safe/histogram.rb, line 27 def self.add_averages(height, ks, lines, mi, step, width) lines[height] = ' ' * width ks.each { |v| lines[height][((v - mi) / step).to_i] = '|' } end
add_graph(counts, height, lines, max_y, width)
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# File lib/everyday-cli-utils/safe/histogram.rb, line 15 def self.add_graph(counts, height, lines, max_y, width) (0...width).each { |i| h = ((counts[i].to_f / max_y.to_f) * height.to_f).round ((height - h)...height).each { |j| lines[j][i] = '#' } if h == 0 && counts[i] > 0 lines[height - 1][i] = '_' end } end
histogram(collection, ks = nil, width = 100, height = 50)
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# File lib/everyday-cli-utils/safe/histogram.rb, line 32 def self.histogram(collection, ks = nil, width = 100, height = 50) counts, lines, max_y, mi, step = setup(collection, height, width) add_graph(counts, height, lines, max_y, width) add_averages(height, ks, lines, mi, step, width) unless ks.nil? lines end
setup(collection, height, width)
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# File lib/everyday-cli-utils/safe/histogram.rb, line 3 def self.setup(collection, height, width) mi = collection.min ma = collection.max diff = ma - mi step = diff.to_f / (width.to_f - 1) counts = Array.new(width, 0) collection.each { |v| counts[((v - mi).to_f / step.to_f).floor] += 1 } max_y = counts.max lines = Array.new(height) { ' ' * width } return counts, lines, max_y, mi, step end