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Re: Log[x]//TraditionalForm

  • To: mathgroup at smc.vnet.net
  • Subject: [mg96070] Re: [mg96049] Log[x]//TraditionalForm
  • From: "David Park" <djmpark at comcast.net>
  • Date: Wed, 4 Feb 2009 05:19:29 -0500 (EST)
  • References: <18434169.1233661588561.JavaMail.root@m02>

You can make your own output format by writing a MakeBoxes definition.

MakeBoxes[Log[x_], form : StandardForm | TraditionalForm] := 
 InterpretationBox[#1, #2] & @@
      {RowBox[{"ln(", MakeBoxes[x, form], ")"}], Log[x]}

Log[x^2 + 2] // TraditionalForm


David Park
djmpark at comcast.net
http://home.comcast.net/~djmpark/  


From: slawek [mailto:human at site.pl] 

The natural logarithm function in "traditional form" in Mathematica (version

6.0.2.0)

  Log[x]//TraditionalForm
  log(x)

This is "not a bug but a feature", but in mathematics the natural logarithm 
is just ln(x) or even ln x.
The true traditional notation use log for decimal logarithm, ln for natural 
logarithm, lb for binary logarithm, and
log_{b}x  for logarithm with base b. Unfortunatelly in most computer 
programs (see FORTRAN) LOG
stands for natural logarithm (an exception is Pascal).

Nevertheless, how to force to use ln(x) instead log(x) ?

The brute way is use /.Log->ln//TraditionalForm.

Is any more elegant way to do this?

slawek





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