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log

Ruby latest stable (v2_5_5) - 0 notes - Class: CMath

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log(z, b=::Math::E) public

Returns the natural logarithm of Complex. If a second argument is given, it will be the base of logarithm.

CMath.log(1 + 4i)     #=> (1.416606672028108+1.3258176636680326i)
CMath.log(1 + 4i, 10) #=> (0.6152244606891369+0.5757952953408879i)

Show source

# File lib/cmath.rb, line 82
  def log(z, b=::Math::E)
    begin
      if z.real? && z >= 0 && b >= 0
        RealMath.log(z, b)
      else
        Complex(RealMath.log(z.abs), z.arg) / log(b)
      end
    rescue NoMethodError
      handle_no_method_error
    end
  end

log

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