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# frozen_string_literal: true
require 'histogram'
#
# Here's how to set up a Gruff::Histogram.
#
# g = Gruff::Histogram.new
# g.title = 'Histogram Graph'
# g.minimum_bin = 10
# g.bin_width = 20
# g.data :A, [10, 10, 20, 30, 40, 40, 40, 40, 40, 40, 50, 10, 10, 10]
# g.data :B, [100, 100, 100, 100, 90, 90, 80, 30, 30, 30, 30, 30]
# g.write('histogram.png')
#
class Gruff::Histogram < Gruff::Bar
# Specifies interpolation between the min and max of the set. Default is +10+.
attr_writer :bin_width
# Specifies minimum value for bin.
attr_writer :minimum_bin
# Specifies maximum value for bin.
attr_writer :maximum_bin
def initialize(*)
super
@data = []
end
def initialize_ivars
super
@bin_width = 10
@minimum_bin = nil
@maximum_bin = nil
end
private :initialize_ivars
def data(name, data_points = [], color = nil)
@data << [name, data_points, color]
end
def draw
@data.each do |(name, data_points, color)|
bins, freqs = HistogramArray.new(data_points).histogram(bin_width: @bin_width, min: @minimum_bin, max: @maximum_bin)
bins.each_with_index do |bin, index|
@labels[index] = bin
end
store.add(name, freqs, color)
end
super
end
# @private
class HistogramArray < Array
include ::Histogram
end
end
Version data entries
8 entries across 8 versions & 1 rubygems