Method: When::Coordinates::Residue::BestRationalApproximations#succ

Defined in:

lib/when_exe/coordinates.rb

#succ ⇒ Array<Numeric>

最良近似分数を生成する

Returns:

• (Array<Numeric>) —

  ( remainder, divisor, error )

  remainder (Integer) 分子

  divisor (Integer) 分母

  error (Float) 誤差

# File 'lib/when_exe/coordinates.rb', line 561

def succ
  value = @current
  if (@count_limit.kind_of?(Numeric) && @count >= @count_limit) ||
     (@error.kind_of?(Numeric) && @e && @error >= @e.abs)
    @current = nil
  else
    if @z==@k
      @e = 0
      @current = [@p[1], @q[1], 0]
    else
      @z = 1.0/(@z-@k)
      @k = @z.floor
      @e = @p[1].to_f/@q[1]-@x.to_f/@y
      @current = [@p[1], @q[1], @e]
      @p = [@p[1], @p[1]*@k + @p[0]]
      @q = [@q[1], @q[1]*@k + @q[0]]
    end
    @count += 1
  end
  return value
end