Module: Freql::ZipF

Defined in:
lib/freql/zipf.rb

Class Method Summary collapse

Class Method Details

.calc_zipf(occurances, total) ⇒ Object 



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# File 'lib/freql/zipf.rb', line 30

def calc_zipf occurances, total
  Math.log10(occurances / total.to_f)+9
end

.zipf_to_cb(zipf) ⇒ Object 



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# File 'lib/freql/zipf.rb', line 26

def zipf_to_cb zipf
  (zipf * 100.0) - 900.00
end

.zipf_to_fpbw(zipf) ⇒ Object 



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# File 'lib/freql/zipf.rb', line 23

def zipf_to_fpbw zipf
  10.00 ** zipf
end

.zipf_to_fpmw(zipf) ⇒ Object 



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# File 'lib/freql/zipf.rb', line 20

def zipf_to_fpmw zipf
  10.00 ** zipf / 1000
end

.zipf_to_fq(zipf) ⇒ Object 



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# File 'lib/freql/zipf.rb', line 17

def zipf_to_fq zipf
  10.00**zipf / 1e9
end