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kerryb/chunked_average.rb

Created March 9, 2012 15:42
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Reduce list to average of chunks of n items
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chunked_average.rb
data = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
chunk_size = 3
chunked_averages = (0...data.length).zip(data).group_by{|a| a.first / chunk_size}.values.map{|a| a.map(&:last).reduce(&:+) / a.size}
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