Class: Numeric

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

Instance Method Summary collapse

Instance Method Details

#frc ⇒ Object 



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# File 'lib/numeric.rb', line 3

def frc
  f = BigDecimal(self.to_s) - BigDecimal(self.to_s).to_i
  return BigDecimal(f.to_s).to_s('F').to_f
end

#to_deg ⇒ Object 



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# File 'lib/numeric.rb', line 14

def to_deg
 self * 180 / Math::PI 
end

#to_grad ⇒ Object 



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# File 'lib/numeric.rb', line 17

def to_grad
 self * 200 / Math::PI 
end

#to_num(n = 3, i = 2, g = 1, c = false, p = false) ⇒ Object 



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# File 'lib/numeric.rb', line 21

def to_num(n=3, i=2, g=1, c=false, p=false)
  # n:  Threshold for when to show exponent
  # i:  Number og digits after the period
  # g:  Exponent grouping g=3 would always show exponent as a multiple of 3
  # c:  Use comma instead of period (European format)
  # p:  Separator per 3 digits (period if c=false, space when c=true)
  # e:  Exponent
  # ge: Grouped exponent
  # x:  Absolute value of number less exponent
  # s:  String to be displayed
  n = g if g > n
  self != 0 ? e = Math::log10(self.abs).floor : e = 0
  ge = g*(e/g).to_i
  x  = self.abs
  x  = (x / 10 ** ge) if e.abs >= n 
  s  = x.to_i.to_s
  self < 0 ? m = "-" : m  = ""
  s.sub!(/-/, '')
  f  = x.frc.to_s[0..(i + 1)].to_f
  f  = f.to_s.sub(/../, '')
  i > 0 ? s.sub!(/(\d*\.)(\d{,#{i}}).*/, '\1\2') : s.sub!(/(\d*).*/, '\1') 
  if e.abs >= n # If exponent kicks in
    s += "." + f.ljust(i, "0")
    s += "e"
    if ge < 0
      s += "-"
      s.sub!(/0\.(\d)/, '\1.')
    end
    ge = ge.abs
    s += "%02d" % [ge]
  else # No exponent
    o = "," if p and not c
    o = " " if p and c
    s.gsub!(/(\d)(?=(\d\d\d)+(?!\d))/, "\\1#{o}") if p
    s += "." + f.to_s.ljust(i, "0")
  end
  s.sub!(/\./, ',') if c
  return m + s
end

#to_rad ⇒ Object 



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# File 'lib/numeric.rb', line 8

def to_rad
 self * Math::PI / 180 
end

#to_radg ⇒ Object 



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# File 'lib/numeric.rb', line 11

def to_radg
 self * Math::PI / 200 
end