Class: Asymptotic::Graph

Inherits:
Object
  • Object
show all
Defined in:
lib/asymptotic/graph.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attempts = 5, problem, algorithm_hash) ⇒ Graph

Returns a new instance of Graph.



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# File 'lib/asymptotic/graph.rb', line 4

def initialize(attempts = 5, problem, algorithm_hash)
  @attempts = attempts
  @problem = problem
  @algorithm_hash = algorithm_hash
end

Class Method Details

.plot(*args) ⇒ Object 



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# File 'lib/asymptotic/graph.rb', line 52

def self.plot(*args)
  self.new(*args).plot
end

Instance Method Details

#plot ⇒ Object 



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# File 'lib/asymptotic/graph.rb', line 10

def plot
  Gnuplot.open do |gnuplot|
    Gnuplot::Plot.new(gnuplot) do |plot|
      plot.title "Average Runtime Analysis of #{@problem} (#{`ruby -v`.split(' (').first})"
      plot.xlabel "Input size"
      plot.ylabel "Average time taken in seconds (ran #{@attempts} times)"

      @algorithm_hash.each do |name, function_hash|
        seeds = function_hash[:input_seeds]
        input_generation_function = function_hash[:input_function]
        function = function_hash[:function]
        sizes = []

        puts "\nRunning benchmarks on: #{name}".green
        runtimes = seeds.map do |seed|

          size = 0
          times_taken = ([0] * @attempts).map do
            input = input_generation_function.(seed)
            GC.disable
            time_taken  = Benchmark.realtime { function[input] }
            GC.enable
            size = input.size
            time_taken
          end
          sizes << size

          print '.'.yellow
          average_time_taken = times_taken.inject(:+) / @attempts.to_f
        end

        points = [sizes, runtimes]
        plot.data << Gnuplot::DataSet.new(points) do |set|
          set.with = "linespoints"
          set.title = name
        end

      end
    end
  end
end