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Re: Log function

  • To: mathgroup at
  • Subject: [mg57359] Re: Log function
  • From: Curt Fischer <tentrillion at>
  • Date: Wed, 25 May 2005 06:03:09 -0400 (EDT)
  • References: <d6us3g$j02$>
  • Sender: owner-wri-mathgroup at

Bill Ginsberg wrote:
> I have Mathematica 5.0.1.  When I attempt to get the Log of a number "a" 
> by entering Log[a], it does not return the value but echoes back: 
> Log[a].  How is this fixed?

In your case I bet "a" is an integer.  Mathematica won't make numerical 
approximations unless you tell it to, so it is outputing the most exact 
form for Log[a] it knows.  If you want a numerical answer, try for 
example  N[Log[2]] or Log[2]//N, or Log[2.].

Curt Fischer

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