File: test_err_bar.rb

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ruby-svg-graph 2.2.2-1
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require 'SVG/Graph/ErrBar'

fields = %w(Jan Feb);
myarr1_mean = 10
myarr1_confidence = 1

myarr2_mean = 20
myarr2_confidence = 2

data_mesure = [myarr1_mean, myarr2_mean]

err_mesure = [myarr1_confidence, myarr2_confidence]

graph = SVG::Graph::ErrBar.new(
  :height => 500,
  :width => 600,
  :fields => fields,
  :errorBars =>err_mesure
)

graph.add_data(
  :data => data_mesure,
  :title => 'Sales 2002'
)

File.open(File.expand_path("test_err_bar.svg",__dir__), "w") {|fout|
  fout.print( graph.burn )
}