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MathGroup Archive 2001

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Re: How to clear OverBar[p]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg30233] Re: How to clear OverBar[p]
  • From: "Orestis Vantzos" <atelesforos at hotmail.com>
  • Date: Fri, 3 Aug 2001 00:56:03 -0400 (EDT)
  • Organization: National Technical University of Athens, Greece
  • References: <9kavjk$c2n$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Yes, ValueQ will return True if there is a definition for the variable.
Orestis

"Martin Richter" <mrMICE.fi at cbs.dk> wrote in message
news:9kavjk$c2n$1 at smc.vnet.net...
> Sorry, I have just one more question.
>
> Normally I clear variables before assigning values so no mistakes are
made.
> But the
>
> Use Unset
> Overbar[p]
>
> only works when Overbar[p] has assigned a value otherwise you will get an
> error/warning. Is there a way to avoid this, like asking if a variable is
> already assigned a value.
>
> TIA
> Martin
>
>
> "Martin Richter" <mrMICE.fi at cbs.dk> wrote in message news:...
> > Hi
> >
> > Thanks for the help and reply. From the thread mention earlier I just
have
> > the impression just to write
> >
> > Overbar[p]
> >
> > and not
> >
> > Use Unset
> > Overbar[p]
> >
> > One of many stupid mistakes,
> > Martin
> >
> > "Martin Richter" <mrMICE.fi at cbs.dk> wrote in message
> > news:9k8706$3kk$1 at smc.vnet.net...
> > > Hi
> > >
> > > Using Mathematica 4.1 I want to Clear the Variable OverBar[p]. I have
> > tried
> > > all suggestions comming from the thread: Re: Clear or remove
definitions
> > > including Subscripts but this does not work here :-(
> > >
> > > TIA
> > > Martin
> > >
> > > ---------------------------------------
> > > Please remove PET to reply by email
> > >
> > >
> > >
> >
> >
>
>
>




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