Forgetfullness
- To: mathgroup at smc.vnet.net
- Subject: [mg7933] Forgetfullness
- From: Alex Tabarrok <00attabarrok at bsu.edu.bsu.edu>
- Date: Wed, 23 Jul 1997 15:46:11 -0400
- Organization: Ball State University
- Sender: owner-wri-mathgroup at wolfram.com
Michael,
David Wagner develops a very nice anti-shadowing package in his
book "Power Programming with Mathematica: the Kernel." The package
automatically prevents the very annoying problem you discuss.
On Sat, 5 Jul 1997, Michael wrote:
>
> Is there a way in Mathematica to recover from forgetting to include a
> package? For example, I type:
>
> ImplicitPlot[x^2+y^2==1,{x,-1,1}]
>
> and Mathematica returns the same thing back. So I go, "Ooops, I forgot
> to load a package." So I type:
>
> <<Graphics`ImplicitPlot`
>
> but instead of being all nice and good this gives me errors like:
>
> Set::write:Tag ImplicitPlot in Options[ImplicitPlot] is Protected.
>
> Clear[ImplicitPlot] does not help. Even after trying to load